Tutorial #22: Optimal performance from the Samsung Galaxy A50 (or any mid-range device)


The demands from the hardware have arisen significantly with every passing year, which is only made worse by manufacturer-specific UIs adding an extra layer of cruft. While hardware capabilities increase demonstrably every year, the software demands more than negate the gains and ensure that even last year's flagship is not a safe bet anymore. However, not everyone needs the latest flagship device or wants to spend a small fortune for the extra processing power.

As I touched upon previously, my primary reason for getting the A50 was the large OLED screen. With gaming on the mobile out of the picture, all I really wanted was to not have a horrible user experience which becomes part and parcel of any mid-range device over time. Mi devices are most offending in that respect with MIUI but Samsung hasn't won itself any honors by bundling lots of promoted apps, some uninstallable, coupled with a Samsung Pay Mini card that interferes with the gesture system.

While adb commands offer a fair degree of control over the device, I prefer to root the device when possible to be able to customise it just that bit better with lesser hassles. The Samsung A50 has perhaps the unintended benefit of being able to boot into the rooted as well as the unrooted system at any point of time which kind of ensure the best of both worlds, if you are not looking to use rooted apps all the time.

With this, I present a step-by-step guide to setting up the device to run like it does when brand new, only better because of the uninstallation of all the bloatware. While it wouldn't make any of games run any faster than what the hardware allows it to, what it does is ensure that the phone is running optimally at any point of time, so no memory-hogs or sudden slow-downs or battery-drains.

1. Rooting the device (optional)

First the disclaimer. Rooting the A50 trips the Knox bit, so you are immediately foregoing device warranty as well as the ability to use any Knox-secured apps like Secure folder and Samsung Pass, though you can still run some Samsung apps like Pay Mini and Health.

For this, I will simply point you to John Wu's excellent tutorial. It has worked with every firmware released till date and allows you to upgrade to every new release while retaining your data, the downside being that you will have to download the entire firmware to do so as OTAs are no-go.

Also, as I mentioned previously, the peculiar partitioning and button combination allows one to boot in to either the rooted or the unrooted system. I personally prefer optimising the system in root mode but don't run it as daily driver as it has issues with WiFi disconnections and random reboots. However, the changes are carried over just fine to the unrooted system which is rock stable and has not rebooted randomly on me till date.

2. Installing Island and making it device admin

Island makes use of the 'Android for Work' feature to create a separate work profile for which it, and consequently you, are the admin. It can be made the device admin without root access provided you delete all other user accounts and make it the admin using adb commands. There is also the option of God Mode which essentially allows Island to control the Mainland apps.

3. Installing Greenify

However, Island by itself doesn't have a background service and it utilises Greenify for that purpose, unsurprisingly from the same developer. While Greenify can normally hibernate apps using Android Doze, the integration with Island takes it to the next level.

4. Deep Hibernation
The easiest way to ensure that apps undergo deep hibernation is to select the 'Auto-freeze with Greenify' option from within Island. This directly adds the app to the "Hibernation list" in Greenify with the 'Deep Hibernation (by Island)' option enabled. Alternately, one can manually add the app within Greenify and then select the same hibernation option.

5. Create 'Unfreeze' shortcut
Subsequent to selecting an app for Deep Hibernation within Island as mentioned in the previous step, it is a good idea to immediately select the 'Create Unfreeze & Launch Shortcut' option which does what it says. It allows you to directly launch the hibernated app but requires you to maintain the shortcut on the homescreen, iOS-style.

6. Create Hibernation Shortcut
Lastly, I would suggest selecting the 'Create Hibernation Shortcut' from the Greenify menu. This places a "Hibernate" shortcut on the home screen, selecting which immediately freezes all the apps for which 'Deep Hibernation (by Island)' has been selected while also queuing up for normal hibernation any other apps you might have selected within Greenify.

7. Profit
The screenshot above indicates my app drawer post-hibernation and as you can see, the "all-time" enabled apps don't even cover a single drawer page (the folders only contain about 4 apps each). At the end of the day, you really don't need Maps or Uber running all the time in the background and tracking your location while draining the battery. Another illustration is the immediate memory consumption which in this example goes from 951 MB free to 1.2 GB free, just by hibernating the currently running apps. The interface fluidity and memory consumption is certainly much better by having only a limited number of running apps at any point of time.
The other benefit is that you can run dual instances of nearly every app, independently within Mainland and Island. A tip over here - it is recommended to create a separate folder (or tab) within your launcher in which you can retain the Island apps that you wouldn't like to be frozen like the duplicates of Play Store or VPN apps. It simply makes the launcher look cleaner and perhaps helps prevent confusion in case the padlock symbol against the Island app icons doesn't work for you.

8. Loss

The only downside I have seen is that the apps don't come up for update on the Play Store unless they are enabled, so be sure to check the Play Store for updates every now and then. Also, as I mentioned previously, the hibernated apps altogether disappear from the launcher and don't reappear within the folder you might have assigned to them, as they are effectively seen as new apps by the launcher on every "unhibernation", though the app data is retained. Hence, the recommendation to create the unfreeze shortcuts on the home screen.

9. Conclusion

There can be some paranoia over having an app become the device admin, especially coming from China. However, I have previously interacted with the app developer over email and have found him to be polite while immediately addressing the issues reported by me.

If you simply want the benefits of an independent work profile, you can use the Test DPC app which allows you full control over the work profile as an admin. You can also use the open-source equivalent of Island known as Shelter.

However, neither of the apps integrate with Greenify like Island and neither are able to create a work profile when the Knox bit is tripped. Hence, in my case, it is the only feasible option to keep rogue Android apps in check. In case you feel differently or have any queries, feel free to drop a comment below and I shall do my best to address the same.

Review #59: JBL Xtreme ★★★★½


My review of the Xgimi Z6 Polar mentioned my disappointment with the in-built Harman Kardon speakers, especially when in pursuit of the home theatre experience. Since then, I was on the lookout for options that would fill this specific void.

It was natural to first consider a sound bar. Here, I was looking at two extremes in terms of (limited) budget as well as sound quality. At one end of the spectrum was the Mi Soundbar. For the price of INR 4999 (USD 70), one can't go wrong, going by the spec sheet. However, it would be unfair to expect it to be anything apart from middling in terms of quality. At the other end of the budgetary spectrum, I was enamoured by the Yamaha YAS-108 selling for INR 18500 (USD 260). It would be my choice (along with the YAS-207, budget permitting), if I ever decide to go with a sound bar. However, an infrequently used projector setup and the awkward option of mounting a speaker below the projection screen led me to look for something more versatile...and portable.

Portability inevitably means switching focus to a category of speakers that one would casually term as "Bluetooth speakers". To make it clear upfront, I have never been a fan of Bluetooth codecs and iffy connectivity, but sometimes it is worth the convenience. In this case, the concern is somewhat alleviated by the fact there is also an Aux-In input present in most cases, though one has to forego advanced digital connectivity options like S/PDIF and HDMI-ARC. It is human to want everything in everything even though compromise is imminent.

With this frame of mind, I headed over to Amazon and as it happened, a Bose banner occupied the front page. The Soundlink Mini II became the object of my focus on account of its stellar reviews. However, the age of the product, accentuated by its archaic Bluetooth version of 3.0, a pretty lowish battery life by today's standard (10 hours) combined and a not-so-lowish price of INR 13000 (USD 183) stressed my little grey cells a bit more than I wished for. Also, keeping algorithmic trickery aside, there is no beating the quality constraints put forth by the physical dimensions of the product. This made me yearn for the Soundlink III, but unfortunately it isn't sold locally and the other products from the Bose range didn't fit my bill.

Venturing to other brands then, I came across my eventual purchase - the JBL Xtreme. In fact, it wasn't so straightforward as I went through numerous other options from Harman Kardon (Onyx Studio), Ultimate Ears (Megaboom), Marshall (Kilburn) and Sony (XB41). The focus in most cases seemed to be on waterproofing (as a poolside speaker), raucous lighting and mega-bass, all of which I was not particularly attuned to. NFC is another feature that gets mentioned a lot, but I can't see myself pairing devices to a speaker so frequently so as to necessitate its presence.

It was a review of the Soundlink III that led me to the JBL Xtreme as it was listed as an equivalent, if not a better option in the same price range. In case you are going by looks, then you wouldn't find anything distinguishable about the Xtreme compared to its smaller and cheaper siblings - Flip and Charge. In fact, it would be completely wrong to form your opinion about a brand based on a product alone, especially a cheaper one. Sound quality doesn't scale linearly with price and it is always a tight rope walk finding a balance between the two. In this case, I can only assure you that size does matter.

Even settling on the Xtreme wasn't without further complications. Considering the price I mentioned previously for the Mini II, one can only imagine a Soundlink III to come close to the USD 300 mark in INR, if it was sold locally. This meant I was staring at the outer realms of my budget. Luckily, with the JBL Xtreme 2 picking up the mantle in this price category, the Xtreme was relegated to a lower price tier, though still commanding a price of INR 15000 (USD 211). This brought me to my second consideration - whether the price difference to the Xtreme 2 is worth it. From the reviews I read, the difference in sound quality between the two is largely imperceptible and the main draw for it, as you can guess, is waterproofing. Pfft.

Would I have spent even INR 15000 on the Xtreme? Possibly no. The real clincher was that I managed to get it for INR 10800 (USD 152). It was quite a matter of luck, patience and persistence. I happened to find a single unit of Xtreme listed separately on Flipkart at the aforementioned low price and correctly postulated it to be an open box item, considering it had a delivery time of 11 days as against 2 days for one listed at the normal price. Listing an open-box product as a new one is deceitful, but it worked in my favour as I was able to avail of the 10-day replacement policy, but not without considerable haggling.

I mentioned the word "portable" previously in relation to Bluetooth speakers. In the case of the Xtreme, I'd rather use the word mentioned on the box - "transportable". It weighs over 2 kg, so calling it portable would be a stretch by any means. Conscious of this, JBL has thrown in a shoulder strap, though I suppose someone from the design team had a good laugh at it. However, having a multi-instrument, vocal Dholak hanging from the shoulder isn't as ludicrous as it may seem.

All that heft must account for something and in the case of the Xtreme, it does so in the form of 2 x 65mm woofers, 2 x 35mm tweeters and two thumping passive radiators with a rated power of 2 x 20W (Bi-amp). With specs, comes power consumption and in the case of the Xtreme, JBL provided an ample 37Wh (10000 mAh at 3.7V) Lithium-Ion battery which is rated to be good enough for 15 hours. On my first complete run on battery, I got about 15h 25m over Auxiliary and 2h 15m over Bluetooth, totalling a run time of 17h 40m. Of course, the battery life depends a lot on the volume, content as well as Bluetooth usage, so my figures are simply empirical. The battery also works as a power bank and the Xtreme features two USB-A ports that can cumulatively output 2A (1x2A or 2x1A) in addition to the charging, aux-in and a service port.


The Xtreme comes with a round-pin charger rated at 57W (19V 3A) which is an awful lot for a battery powered device. However, it ensures that the device gets fully charged within 3 hours (though the specs mention 3.5 hours). To my amusement, I found that the charger works with my Z6, so in effect I now have a charger redundancy, which is always appreciated, to a point. The battery life is indicated with the help of 5 LEDs on the front which is pretty vague and the device could have done with a battery percentage callout. Lastly, despite its age, it comes with Bluetooth 4.1 on board which is any time better than what's onboard with the similarly old Soundlink Mini II.

Moving on to the most pertinent aspect of the device, the sound. The thing that hits you in the face (specifically the ears) on your first playback is the bass (along with the vigorously vibrating radiators). If your first track happens to be a vocal one like mine was, then you would be justified in harbouring some doubts. However, even with overpowering bass, the width of the soundstage becomes evident and it is able to reproduce sound pleasantly across the spectrum. The bass tends to eat in to the mids for tracks that have even a modicum of it, though the treble is unblemished. This helps it as a party (and home theatre) speaker but not as a music one.

Thankfully, pressing the 'Bluetooth' and 'Volume -' buttons simultaneously for 10 seconds significantly flattens the frequency response and brings any vocal or instrumental track to life. What it actually does and why it isn't documented in the manual is beyond me. There are 30 volume steps present on the device itself when used independently but it links up to the phone volume levels on pairing. The speaker is plenty loud to fill up any mid to large sized room, though oddly, the volume over Aux is significantly lower than over Bluetooth. There is no official mention of any other codec support and going by the fact that Android always defaults to SBC on selection of any other codec, it seems that's the only supported codec. While I couldn't bear SBC on cheap Bluetooth headphones in the past, the sheer quality of the speaker makes it less of an issue, and one can always switch to good old Aux. Lastly, there is the 'JBL Connect' button to pair up additional compatible JBL devices with the Xtreme but I find no use for it in a home setting.

The app support for this device is pretty barebone. The 'JBL Music' app on iOS simply lists the songs from Apple Music and mentions AirPlay support. The "AirPlay" option is nothing more than the native iOS selection of a Bluetooth receiver, so is of no practical use. Having said that, playback of the same track on Apple Music is much better than Spotify, though it is mostly due to the impact of transcoding from AAC compared to Ogg Vorbis. The 'JBL Connect' app is a tad more useful in the sense that it is supposed to provide firmware update notifications, though I didn't get any and it is unlikely I ever will, considering the age of the product.

To conclude, if you can get the device for less than $160, then there is simply no better option available. Sound doesn't degrade with age (of the speaker, unfortunately not of the listener), so it still holds up well against the $300 Xtreme 2 in terms of quality but beats it in terms of value for money. In short, for a discounted price, the Xtreme is highly recommended.

Musing #57: Steam Link on Fire TV


The release (or lack of it) of the Steam Link app caused a lot of brouhaha in the past month. While it it is meant for mobile devices, it undeniably adds a lot of value to the Fire TV and for that matter to all Android devices. It is a must-have that would have certainly made it to my list of  'The Essentials' were it available back then. It is not officially available on Amazon, so your best bet is to sideload it.

As I mentioned previously in my review of the AFTV3, the Ethernet adapter doesn't make a whole lot of sense as it is limited to 100 Mbps. However, it would be more than enough in this case as Steam Link requires a maximum of 30 Mbps for streaming. Unfortunately, I had to rely on the 5 GHz WiFi network (Steam Link doesn't support 2.4 GHz) with the TV being 25 metres away from the router, separated by a wall. This issue is compounded by the fact the 5 GHz receiver on the AFTV3 is exceptionally weak.

After playing with the settings, the only way I could get Steam Link working on the AFTV3 over such a long distance was by switching the 5 GHz channel bandwidth to 20 MHz. This significantly reduces the throughput but is a necessity for my current setup which I hope to change soon. Over the 20 MHz channel and at a distance of 25 metres, Steam Link works unimpeded in the 'Balanced' mode which uses 15 Mbps. I was even able to get the 'Beautiful' mode, requiring 30 Mbps, to work over the 20 MHz channel but it was inconsistent. On the other hand, it worked exceptionally well over the 40 MHz channel as can be seen below, but the AFTV3 was unable to sustain the signal over the distance, resulting in frequent disconnections. Nonetheless, this is an issue that can be easily resolved through some rearrangement.


Steam makes it quite evident that the software is in beta and that AFTV is not officially tested.


 However, as long as the network is up to it, the AFTV is more than capable of streaming.


Inability of the network to stream properly is indicated with the frame loss and network variance.


Setting up Steam Link is extremely easy as it essentially requires pairing the TV with the host PC using a PIN.


Additionally, the Steam Client on PC requested the installation of additional audio drivers once the setup was done, but I presume this might depend on the setup. I had sold my Xiaomi Bluetooth controller a few months back so I didn't have a controller to pair with Steam. However, I did have my Apple Wireless Keyboard and Logitech M557 paired to AFTV which ought to have done the job. 


While the keyboard worked fine with the Big Picture mode, v1.1.3 of Steam Link that I installed initially didn't support the mouse which was subsequently rectified in v1.1.4, indicating that Valve is actively paying attention to user feedback. At present, the lag isn't too bad, but the mouse controls are too sensitive which I presume is due to the fact that the tuning has been done as per analog controllers. It might make sense to pick up the Xbox One S or Steam controller for universal compatibility.

With the initial impression being quite good, one can only hope for Steam Link to work seamlessly once it comes out of beta. Perhaps the Steam Sale will become a lot more attractive for AFTV owners.

Review #52: Tale of three (make that five) 3-in-1 cables


Cables are like humans, more than one can imagine. Looks can be deceiving and it is what's inside that matters. However, one can only perceive what one can see and hence the truth lies largely concealed. Thankfully, that is where the similarities end since marketing buzzwords like "gold plated", "tinned copper", "braided nylon" wouldn't really work well as complements for humans.

My tryst for the holy grail of cables started some time back when I started off with the Flome 3-in-1 cable, which, for the record, left me thoroughly disappointed. I have resigned myself to the fact that as long as reputable brands don't get in to the game, the possibility of expecting the ultimate phone charging cable to come from no-name brands in China is as large as catching the unicorn at the end of the rainbow. However, that hasn't deterred me from trying.

Since my last look at charging cables, I have added a couple more 3-in-1 cables, one from Baseus and another from "Fake Mi". The Baseus brand has proliferated quite a bit and I had my first go at it when I purchased a tempered glass for my iPhone. As it turned out, the mention of glass for the product was an euphemism but even then, the brand gets full marks for design and half for deception. I had a good experience with Mi's 2-in-1 cable which I had received with the Mi Power Bank Pro and although there is no mention of a 3-in-1 cable on Mi China's website, I went along for the ride by placing an order for the "Fake Mi" 3-in-1 cable. In this case, it was better to judge the cable by its cover since the package was branded as "Zaofeng" but the product could easily pass off  as an official Mi one.

Along with these three "the last cable you will ever need" cables, I have roped in two "not so in name but in function" pseudo 3-in-1 cables in the form of the Mi 2-in-1 and the EasyAcc Micro USB cable. In case you are confused, then don't be, as technically any Micro USB cable can be used as a Lightning or Type-C cable with the help of adapters. Sure, you don't get the official certifications, but it can get the job done as far as charging is concerned. In this case, the adapters came from the cannibalisation of other cables. After all, all's fair in love, war and charging.

Here's the fate of the contenders after being put through the trial with an Anker PowerPort 4 charger.


It is easy to draw some quick observations/conclusions from the above.

  • As expected, none of the 3-in-1 cables are up to much good, though the Baseus one seems to be the best of the lot. The finest option yet, as far as charging goes, is to get a good quality Micro USB cable and then use adapters to switch between devices.
  • The adapter quality can affect charging as can be seen by the performance difference of the Lightning one between Flome and Zaofeng. They are available for a few cents and can be jerry-rigged to function like a 3-in-1, though I presume at some point someone will release adapters with clasps. Cannibalisation from existing cables is always an option.
  • It is not a co-incidence that the shorter cables are usually the best. You should get a cable that is only as long as you need it to be. As I had mentioned previously, the longer they are, the easier they fail.
  • While not visible in the table above, the iPhone current draw was markedly different from the Mi devices. While the Mi devices charged flat out at the same current level irrespective of usage, the iPhone switched between 0.9-1.7A  depending on how the device was being utilised. I could draw the maximum current only by recording in 4K. This indicates that the iPhone maintains a preset charging rate for the battery while utilising additional current draw from the charger for on-screen activity. I guess these benefits come through the utilisation of much more expensive power management ICs.

Review #51: Amazon Fire TV (Gen 3 - 4K HDR) ★★★★☆


Normally, whenever I get a new device, the instinct is to analyse it in depth. Unfortunately, certain constraints prevent me from doing so with the Fire TV 4K, primary of them being that I have no 4K display devices at present. However, a lot of thought had gone in to purchasing this device for a 1080p non-HDR TV, even though it is not officially available in India. So, I would like to share these thoughts along with the experience of setting it up so as to get the most out of it. Thus, this article will straddle the line between a tutorial and a review, but I have decided to classify it as the latter since this article, while being instructional, is still appraising the product.

Review #50: RHA MA650 Wireless Earphones ★★★★☆

When wireless doesn't mean getting less! 


Bluetooth headsets have always been a matter of convenience for me rather than a technological evolution over wired headsets. For a long time, I preferred to use wired headsets whenever possible and took recourse to Bluetooth headsets when on the move. However, the abysmal performance of Bluetooth plug-in headsets like SBH54 and the Fiio BTR1 left me extremely disappointed and finally set me on course to finding a standalone wireless earphone.

Review #45: Mi A1 (Updated with Oreo impressions) ★★★★☆

An A1 Choice


The Android One programme was launched in 2014 with the intention of being the entry point for budget conscious users. Perhaps it was the choice of hardware or OEMs that ultimately made it a stillborn venture. On the other end of the spectrum, the Pixel hasn't quite turned out to be the iPhone killer that Google might have envisaged. However, Google isn't one to take things lying down and hence we now have the reinvigorated Android One programme. This time Google has taken a much more hands-off approach, with this being no more than a branding exercise and the entire onus of the device specification as well as updates following squarely on the shoulders of the OEM.

For an OEM like Xiaomi that is well entrenched in MIUI, it certainly came as a surprise when it was mentioned as the first partner of the new avatar of Android One. At the same time, it seemed a logical choice considering the stranglehold that various Mi devices now have at the budget segment of the market. I had already "upgraded" the Redmi Note 3 of one of my family members to LineageOS to make the device more usable and while getting another Mi device, it was a toss-up between getting a Redmi Note 4 and flashing it with LineageOS or getting the Mi A1 with stock android on board. Ultimately, the novelty of the dual camera setup as well as a manufacturer supported implementation of stock Android justified the premium.

While the review is focussed on the Mi A1, I found it a good idea to compare it with the other phones I have at my disposal which is the Redmi Note 3 and the iPhone 7. The Note 3 should be a good comparison coming from the same stable but based on a year-old higher performance chipset while the iPhone 7 acts like a good benchmark.