Database Users

Phone crash after battery died!!

my battery was running low, (and coz poor battery issues with JPY), i didnt notice when it switched of. normally i use the power button to turn the screen on to unlock, but instead i realised the phone had been off as it was now booting up...it booted up fine went into the homescreen and then vibrated once and powered down.......now it was powering down for a long time and occasionally there were vibrations and the lights on the home keys were constantly on. the screen was black. i got home and tried to charge it but the progress bar showed no progress on charging, i tried to switch it on but it would go to startup screen vibrate cupla times and power down. so eventually had to do a hard reset in recovery mode. tried every option but in the end had todo it by wiping data.
now the thing is, is this supposed to happen? if ur battery suddenly losses power ur whole fone will screw up?
for future ref if ur battery dies dont try to switch ur fone on until u got some charge in it and use the home key to put screen on..

Sounds like it could have been faulty firmware .
JPY does not have a significant battery drain problem per se .
jje

Black screen, vibrations and no boot after restart
Hello! I had almost the same experience (Black screen after reboot and occasional vibrations) only mine refused to boot even after memory wipe and after flashing new roms.
Was your phone rooted? Because I think rooting a 2.2.1 rom (XWJS3) was the beginning of my nightmare. keep in mind that the phone was working like charm for two months. This was the second time I had a problem. The first time the phone started after performing a factory reset by itself!
In case this happens to you next time and for every non experienced galaxy player (like me) reading this:
Don't panic! Blank screen, vibrations and no boot doesn't necessarily mean a hardware problem. Finally I managed to fix it flashing eclair and repartitioning with pit512. Now I'm a happy XWJS8 user
And a question for the experts: Any clue why this happened? Is it really a rooting issue? Can a cheap Chinese battery from ebay cause this?

everything was stock on mine, no root.......maybe thats why i could recover it??!!

Maybe! and I hope the reason is faulty firmware as JJEgan says. If this is true, your phone will be fixed by the next update.

I was very urge... the same happened again. It's been a month of smooth functioning and now after a simple restart, the device doesn't boot for absolutely no reason (Stuck on black screen constantly vibrating). Since my phone wasn't rooted, and I haven't seen many people talking about a problem like this I suspect:
1. Faulty hardware (for a few devices including yours and mine)
2. A Bad app.

Contacts Vanished
Hey Everyone
Im having similar problems, i updated my sgs to the js7 version of froyo, then rooted it with oneclick method. this was as i got the phone a month ago. Its been smooth sailing since then. But last night the phone powered down and wen it loaded up it had no contacts, my sms where still there but all the apps had a force close issue none worked. so cleared the cache in recovery. Still nothing so i did a factory reset and once loaded up. i formatted the sd and internal within the settings option. So the phone was now clean. I then connected to pc luckily had backups so installed titanium restored all my apps n settings. Using kies restored my contacts n thanks to an app called sms backup i restored those.
So all was well and worked again. I didnt restore the apps i had installed within the last week to make sure it was not a faulty app. I was happy, but now tonight it did it again. No contacts again.
Pls help
Any suggestions

That's exactly how it started for me. One month after rooting froyo 2.2.1 Suddenly everything force closes and the device hard resets by itself. I reinstall all the apps and then after one month and performing a simple restart, it refuses to boot. Stays in a black screen and vibrates every some seconds. I flash a new rom but does the same. Problem solved after repartitiong and flashing original eclair with pit 512. Reflashed a 2.2.1 rom and everything works perfect (the phone now is unrooted and with a nice clear stock rom). But then after one month again (!) I realise that some videos refuse to play. Trying to restart and craaash. black screen, vibrations and no boot. Did the same again (repartitioning and flashing) and now I wait for another month to pass and lose an hour of my life to do the same again. No idea why this is happening. Is it possible that rooting messes with something that stays faulty after restoring the file system? is there an app that we all installed and caused this mess? please this is the most serious problem I've red in this forum and still a mystery. I believe this thread should be sticky and we all share similar experiences because this looks completely random!

I believe this thread should be sticky and we all share similar experiences because this looks completely random![/QUOTE]
+ 1

Stuck on black screen (5.0 w/ hybrid modem)

Hi guys,
I flashed 5.0 over the weekend and the .33/84 hybrid modem to enable LTE. I also made Google Search my home launcher.
The issue is screen becomes black, just showing the status bar and navigation bar. The system bar and navigation buttons are responsive and i can access the notification drawer/system panel but tapping on them does not remove the black screen. The only way to fix it appears to be a reboot. It started out intermittently but now it's happening within just a few minutes of each reboot.
I've tried clearing cache partition from (stock) recovery but it doesn't seem to have helped.
Thanks in advance!

The pattern I've started to notice is that it happens when I get some sort of popup. For instance I use handcent for SMS and half the timeI get a text I end up getting the black screen. I just got a Facebook message and I'd imagine the little circle that shows up on the screen caused it this time.

I've gotten the black screen a couple of times over the last few days since installing 5.0 using the factory image. All that can be seen are the navigation and status bars and there is no touch screen response at all, only a reboot solves the issue. I never saw this happen at all before upgrading.

Have you tried using the .33/1.04 Hybrid modems? I have been using them since they released and never had this happen when using Messenger or Textra and getting pop-ups.

acejavelin said:
Have you tried using the .33/1.04 Hybrid modems? I have been using them since they released and never had this happen when using Messenger or Textra and getting pop-ups.
Click to expand...
Click to collapse
I haven't tried that modem. I've even returned back to the stock modem that came with the 5.0 image and am still having the same issue. Do you have a link to the .33/1.04 modem? Thanks

torchedlh said:
I haven't tried that modem. I've even returned back to the stock modem that came with the 5.0 image and am still having the same issue. Do you have a link to the .33/1.04 modem? Thanks
Click to expand...
Click to collapse
Honestly, if it does that with the stock modems, I would reflash the factory images clean, then use this one: http://forum.xda-developers.com/nexus-4/general/4-4-3-nexus-4-lte-lte-tethering-hotspot-t2416822

swallowingled said:
I've gotten the black screen a couple of times over the last few days since installing 5.0 using the factory image. All that can be seen are the navigation and status bars and there is no touch screen response at all, only a reboot solves the issue. I never saw this happen at all before upgrading.
Click to expand...
Click to collapse
Even i'm facing the same issue, have you found any way out?

acejavelin said:
Honestly, if it does that with the stock modems, I would reflash the factory images clean, then use this one: http://forum.xda-developers.com/nexus-4/general/4-4-3-nexus-4-lte-lte-tethering-hotspot-t2416822
Click to expand...
Click to collapse
Just reflashed 5.0 and seems to be going okay so far (haven't seen the issue). Is it okay to just flash the hybrid modem without using the rest of the LTE enabler? I don't mind having to manually select the network after every reboot...

torchedlh said:
Just reflashed 5.0 and seems to be going okay so far (haven't seen the issue). Is it okay to just flash the hybrid modem without using the rest of the LTE enabler? I don't mind having to manually select the network after every reboot...
Click to expand...
Click to collapse
Yes, you can certainly do that if you wish.

Crap. Still having this issue. Anyone else?

torchedlh said:
Crap. Still having this issue. Anyone else?
Click to expand...
Click to collapse
Yes, this is still happening and I'm just using the stock modem(not hybrid). I've also reflashed the factory image 3 times. I get the black screen at least once a day, sometimes only icons or folders or widgets disappear.

Im struggling with the same problem.
Stock 5.0 google image / With some other kernels / Even tried recent Rastapop. - Wiped System/cache/data, didnt help.
Also i have problem with connecting phones storage via USB. I can Barely access internal storage thru computer.

possible solution
Since I deactivated the app called "Tasker" my phone works just fine again... Plus that I deinstalled two other apps that required superuser rights.
Hope that helps others.

Still having this issue, even on 5.0.1 any ideas?

Okay I *think* I may have figured out the problem. I think it has to do with apps that try to enable/disable the lockscreen. I had Settings Profiles set to disable/enable my lockscreen based on location. I've just removed that setting and so far it looks like the problem may be gone.

I don't think this is a modem issue. If you Google "lollipop black screen" you'll get quite a few hits. I remember reading something last week about this bug affecting lollipop builds.
I'd say stick with the modem that makes you happy :good:

Stock modem and rooted on 5.0.1 and I have the same issue. In my case it is not random and only occurs specifically when I dial the phone from the Avast Mobile Security website (There is a test mode to call the phone). Not sure how they dial into the phone but the screen goes black with only the notification bar on top and navigation buttons on bottom. The notification bar works but the navigation buttons do nothing until the incoming phone call ends, at which time everything returns back to normal. Regular incoming phone calls do not exhibit this behavior. Now if I access the phone from the Avast website by entering a text message instead of a phone call, a pop-up appears on my phone along with my message, but it does not cause the screen to go black.
pete1450 said:
The pattern I've started to notice is that it happens when I get some sort of popup. For instance I use handcent for SMS and half the timeI get a text I end up getting the black screen. I just got a Facebook message and I'd imagine the little circle that shows up on the screen caused it this time.
Click to expand...
Click to collapse
Hum, sounds like it could be what I am experiencing...possibly a pop-up interfering with the phone call screen.
EDIT: (SOLVED). After contacting Avast via their forum, it turns out that they are doing this on purpose. It is supposed to prevent a thief from ending the call, although that is as simple as restarting the device.

Note 4 freezes while charging after lollipop

I tried posting this in the Sprint thread but haven't gotten any answers yet so perhaps I'll have better luck here. I pasted both posts to show the initial problem and what I did (essentially I factory reset). I'm still having the same problem where my phone will freeze while I'm charging it (about 2-3 times/week) requiring a battery pull. Anybody else seeing this problem or have suggestions on what I should try? Thanks.
-----------------------------------------------------------------
Twice this week my alarm didn't go off (luckily I set a backup today) because sometime throughout the night something happened. When I woke up the phone was frozen on the yellow Sprint Spark startup screen. I needed to pull the battery and everything started up fine. I updated to Lollipop about 2 weeks ago which is where I'm guessing the issues stem from.
Is there anything I should try other than restoring to factory and starting over? I'd prefer to not have to wipe everything from my phone but these issues are becoming problematic. I am not rooted.
Thanks.
--------------------------------------------------------------------
So I ended up doing a factory reset and while the phone certainly started running faster with better battery performance after the reset I'm still having this issue. I would say it occurs 2-3 times a week. It has only occurred overnight which is typically when I charge my phone so I'm pretty sure it is related to being left connected to the charger. The majority of the times I will wake up with a dim yellow Sprint screen and everything else frozen though occasionally the screen will be black with the led notification light red. In both situations the screen will not respond to any button pushes or holds and I need to pull the battery and then everything will start up fine.
Does anybody have any suggestions here on what I should do? I guess I can try and restore one more time and see but I don't really know why it would be different and it is certainly a pain to keep restoring the phone and losing all my settings. I definitely don't want to root now since I believe that voids the warranty and if I can't figure anything out with this I'll certainly be requesting a new phone from Sprint. Before I start dealing with Sprint though I thought I would check here first. Through all my searches on the internet I haven't seen anyone else complaining about this problem.
Thanks.

ks-man said:
I tried posting this in the Sprint thread but haven't gotten any answers yet so perhaps I'll have better luck here. I pasted both posts to show the initial problem and what I did (essentially I factory reset). I'm still having the same problem where my phone will freeze while I'm charging it (about 2-3 times/week) requiring a battery pull. Anybody else seeing this problem or have suggestions on what I should try? Thanks.
-----------------------------------------------------------------
Twice this week my alarm didn't go off (luckily I set a backup today) because sometime throughout the night something happened. When I woke up the phone was frozen on the yellow Sprint Spark startup screen. I needed to pull the battery and everything started up fine. I updated to Lollipop about 2 weeks ago which is where I'm guessing the issues stem from.
Is there anything I should try other than restoring to factory and starting over? I'd prefer to not have to wipe everything from my phone but these issues are becoming problematic. I am not rooted.
Thanks.
--------------------------------------------------------------------
So I ended up doing a factory reset and while the phone certainly started running faster with better battery performance after the reset I'm still having this issue. I would say it occurs 2-3 times a week. It has only occurred overnight which is typically when I charge my phone so I'm pretty sure it is related to being left connected to the charger. The majority of the times I will wake up with a dim yellow Sprint screen and everything else frozen though occasionally the screen will be black with the led notification light red. In both situations the screen will not respond to any button pushes or holds and I need to pull the battery and then everything will start up fine.
Does anybody have any suggestions here on what I should do? I guess I can try and restore one more time and see but I don't really know why it would be different and it is certainly a pain to keep restoring the phone and losing all my settings. I definitely don't want to root now since I believe that voids the warranty and if I can't figure anything out with this I'll certainly be requesting a new phone from Sprint. Before I start dealing with Sprint though I thought I would check here first. Through all my searches on the internet I haven't seen anyone else complaining about this problem.
Thanks.
Click to expand...
Click to collapse
Hi there. I have a Canadian Note 4 (W8) with Bell, and I am having identical issues.
While charging over night, I find my phone stuck on "Samsung" logo, with the bubble animal still running. Holding down the power button does nothing and the only work around is the battery pull. I noticed that it also gets warm (assuming from the screen on time?)
First tried cache wipe - no fix
Factory reset - no fix
Cache wipe again - no fix
Aaaand today I came into work late

jbkmin said:
Hi there. I have a Canadian Note 4 (W8) with Bell, and I am having identical issues.
While charging over night, I find my phone stuck on "Samsung" logo, with the bubble animal still running. Holding down the power button does nothing and the only work around is the battery pull. I noticed that it also gets warm (assuming from the screen on time?)
First tried cache wipe - no fix
Factory reset - no fix
Cache wipe again - no fix
Aaaand today I came into work late
Click to expand...
Click to collapse
Did your issues first start after you upgraded to lollipop?

ks-man said:
Did your issues first start after you upgraded to lollipop?
Click to expand...
Click to collapse
Definitely after the upgrade.
While on KitKat, it never happened (1 month ownership). But after upgrading to lollipop, it has happened 4 times (6 nights since lollipop).

Have you figured anything out with your situation? Woke up this morning to my backup alarm and the Yellow Sprint screen on my phone.
I guess I'll have to try another factory reset and if it still happens try and get a replacement. It just doesn't seem widespread enough of an issue to be a software bug with 5.0.1.

Very frustrated. I did another factory reset but the issue still plagues my device. It still only occurs once or twice a week but when I hear my old clock radio alarm in the morning I know when I look over I'll see the yellow frozen Sprint Spark screen. I am completely out of ideas and guess I will need to have it replaced under warranty. I'm hoping Sprint won't give me a hard time as this will be very hard to demonstrate.
It definitely appears to be a software issue as it never happened before I upgraded to Lollipop but there must be more to it or others would be complaining.
If anybody has ideas please let me know. Thanks.

Response to Note 4 Freeezing while charging
I have found that after turning the quick charge feature off the problem is not happening. Hopefully this is fixed in 5.1

I'm having the same issue even after turning quick charge off..def a lollipop bug, never experienced this on kk.

I know its not the BEST option, but after taking the update to lollipop, sometimes left over kitkat files can make the system poop out. Sometimes a factory reset will take care of the leftovers. But of course, then you have to set your phone up again
If you've tried this or plan to to, let us know the results.
(When i first took the update, my heartrate monitor sensor was always on, so i did a factory reset and it fixed my problem).

Solved with workaround!!!
I faced this "sleep of death" too after updating to Lollipop. I had to pull out the battery almost every time after charging. Very annoying! I noticed though that my phone never froze in my car while charging. Thinking about the difference I realised that I keep my phone awake in the car while charging using Macrodroid (which I love anyway to automise all kinds of things). I made a simple macro which keeps my phone awake while charging and another one that returns the phone to normal while on battery.
While charging: Trigger: Power Connected; Actions: Keep Device Awake enabled & Screen Off, Constraints: None
On Battery: Trigger: Power Disconnected; Actions: Keep Device Awake disabled & Screen Off, Constraints: None
Off course there are alternatives available to Macrodroid that should be able to do the same.
My problems are solved, with and without fast charging. I hope this will help some of you as well.

same problem here
Ive tried turning off fast charging option on the powersaving mode
And also tried the option on developer mode, the "keep device awake while charging"
And even flashing dofferent firmwares from sammobile through ODIN and installed custom roms. These options doesnt resolve the issues on freezing while charging..
I think turnong off your device while charging is the only option..
Im using note4 N910C..

Clasimodo said:
Solved with workaround!!!
I faced this "sleep of death" too after updating to Lollipop. I had to pull out the battery almost every time after charging. Very annoying! I noticed though that my phone never froze in my car while charging. Thinking about the difference I realised that I keep my phone awake in the car while charging using Macrodroid (which I love anyway to automise all kinds of things). I made a simple macro which keeps my phone awake while charging and another one that returns the phone to normal while on battery.
While charging: Trigger: Power Connected; Actions: Keep Device Awake enabled & Screen Off, Constraints: None
On Battery: Trigger: Power Disconnected; Actions: Keep Device Awake disabled & Screen Off, Constraints: None
Off course there are alternatives available to Macrodroid that should be able to do the same.
My problems are solved, with and without fast charging. I hope this will help some of you as well.
Click to expand...
Click to collapse
Thanks a lot, Mate. I'm trying your workaround now. Will report later if it works on my phone. BTW, so, are you sure it is a just a system issue? Definitely, isn't a hardware problem? Did you fix it, after your post -a month ago-, installing, for example, lollipop 5.1.1 or Cyanogenmod 12.1? I'm on 5.0.1, SimpleRom V4. Of course, mi device, N910C, is rooted.
Thanks again.

With lollipop 5.1.1 the problem is solved for me, even without this workaround.
Sent from my SM-N910F using XDA Forums PRO

I'm having similar issues as you guys. I found out that my phone will only perform normally when I charge it with my laptop USB port which I think is around 0.5amps. Anything above that, even a 1amp charger would cause the phone to freeze, reboot and turn off and not turn back on. The phone has been in repair 4 times and the problem is still there. Now every night I'm forced to charge my phone with my laptop which takes an age instead of the fast charger that came out of the box.
Currently my phone is still freezing and rebooting when I'm out and about and the only way I can get it to perform normally is when I plug it into my laptop. This normal functioning would only last whilst the phone is plugged in.

Unable to turn WIFI On.

Hi there, I had my phone for about 5 or 6 months where it was fine till recently.
The problem was that I am unable to turn the wifi on. in the main settings the slider is greyed out and a text is on screen saying turning on WIFI but it does not. it does not even show the list of networks. it quick settings it shows as searching but nothing is listed.
in the about phone settings it shows the mac address to be 02:00:00:00:00:00.
This occurred a few days ago but no new software was installed the most recent being a week before to the April security update.
I have tried multiple things such as turning on the airplane mode then off, switching phone on or off, safe mode, factory reset, wiping the cache, taking the sim out.
There has been instances where I am able to connect to a wifi network but it does not last long (few mins) except when taking the sim out which lasted about half a day. (tried again but did not work)
My phone is not rooted and has the stock rom.
There has been some research on this matter where people have done something with the presist(I think that is what it is call) folder but there was no result on it so I have not tried it due to wanted to keep the phone unrooted due to warranty concerns.
I would love some solutions in figuring out this problem.
Thank you for your time.

TheFallenMonkey said:
Hi there, I had my phone for about 5 or 6 months where it was fine till recently.
The problem was that I am unable to turn the wifi on. in the main settings the slider is greyed out and a text is on screen saying turning on WIFI but it does not. it does not even show the list of networks. it quick settings it shows as searching but nothing is listed.
in the about phone settings it shows the mac address to be 02:00:00:00:00:00.
This occurred a few days ago but no new software was installed the most recent being a week before to the April security update.
I have tried multiple things such as turning on the airplane mode then off, switching phone on or off, safe mode, factory reset, wiping the cache, taking the sim out.
There has been instances where I am able to connect to a wifi network but it does not last long (few mins) except when taking the sim out which lasted about half a day. (tried again but did not work)
My phone is not rooted and has the stock rom.
There has been some research on this matter where people have done something with the presist(I think that is what it is call) folder but there was no result on it so I have not tried it due to wanted to keep the phone unrooted due to warranty concerns.
I would love some solutions in figuring out this problem.
Thank you for your time.
Click to expand...
Click to collapse
Have you tried performing a factory reset and flashing the factory images?

Heisenberg said:
Have you tried performing a factory reset and flashing the factory images?
Click to expand...
Click to collapse
I haven't but will try to do it tonight hopefully.
Wish me luck

Good luck!

Heisenberg said:
Good luck!
Click to expand...
Click to collapse
Nope flashed it but still the same problem.

TheFallenMonkey said:
Nope flashed it but still the same problem.
Click to expand...
Click to collapse
Bummer, looks like you've got a hardware failure.

Heisenberg said:
Bummer, looks like you've got a hardware failure.
Click to expand...
Click to collapse
I was hoping it wasn't that

Same problem dont know what to do.... Factory reset\Flash factory img and other not helping at all...

Damn. I had the same thing with my n5. WiFi never showed up to the party. That's why I got the 6p... And the g4.... And the

This problem is exactly what happened to me also, since two days ago. I was searching for a solution and found this thread. Can anyone here who had this problem share how they fixed the issue? is it really a hardware problem?
Thanks!

System UI error and overall interface lagged after update to Android 10

Hi guys, first of all, I came from miui 11.0.6.0 global stable rom and rooted with magisk. I update my note 7 to android 10 global stable version which release recently via "choose update package" in the setting. Everything works perfectly until I boot it up and got "System UI error" pop-up. After clicking wait, the UI restarted but its getting worst. Everything I did even locking the screen was sluggish. So in the end I change back to my original rom and unfortunately, my phone lags too but no error pops up. Trying to clear cache and even clearing the system via orangefox and reinstall the OS but it still lag. Wonder if anyone have the same issue and has solved it?

Alifirdaus said:
Hi guys, first of all, I came from miui 11.0.6.0 global stable rom and rooted with magisk. I update my note 7 to android 10 global stable version which release recently via "choose update package" in the setting. Everything works perfectly until I boot it up and got "System UI error" pop-up. After clicking wait, the UI restarted but its getting worst. Everything I did even locking the screen was sluggish. So in the end I change back to my original rom and unfortunately, my phone lags too but no error pops up. Trying to clear cache and even clearing the system via orangefox and reinstall the OS but it still lag. Wonder if anyone have the same issue and has solved it?
Click to expand...
Click to collapse
Format data !

Z750z said:
Format data !
Click to expand...
Click to collapse
already done that and it's still lag. Tried it several times and reinstall but no luck. I think it has something to do with my phone compatibility..idrk

Alifirdaus said:
already done that and it's still lag. Tried it several times and reinstall but no luck. I think it has something to do with my phone compatibility..idrk
Click to expand...
Click to collapse
Try to flash fastboot stock rom , maybe it will fix your problem.

Stuck on dark mode
I successfully installed the Android 10 OTA update on my Redmi Note7 about two hours ago, however, my phone has been stuck on dark mode ever since.
The toggle isn't activated from quick settings, neither is it switched on from the display settings. This is happening despite my battery being at 68%. It only disable dark mode when I plug it in power outlet.
Please, who knows how I could fix this? I like dark mode but not during the day or in a well lit environment.
I've tried downloading the Themes for Telegram app, using the security app to scan as I read somewhere, heading into developer settings to make sure that dark theme isn't enabled, rebooted my phones a couple of days ago times, with and without charger charger plugged in. I should note that my status bar has been acting weird since I updated to MIUI 11 in January, like showing black icons and text on black background, and vice versa. And the battery icon not reflecting the actual battery status.
Someone help, please. This is getting to my nerves already. ??

Cyb3rFr4nk said:
I successfully installed the Android 10 OTA update on my Redmi Note7 about two hours ago, however, my phone has been stuck on dark mode ever since.
The toggle isn't activated from quick settings, neither is it switched on from the display settings. This is happening despite my battery being at 68%. It only disable dark mode when I plug it in power outlet.
Please, who knows how I could fix this? I like dark mode but not during the day or in a well lit environment.
I've tried downloading the Themes for Telegram app, using the security app to scan as I read somewhere, heading into developer settings to make sure that dark theme isn't enabled, rebooted my phones a couple of days ago times, with and without charger charger plugged in. I should note that my status bar has been acting weird since I updated to MIUI 11 in January, like showing black icons and text on black background, and vice versa. And the battery icon not reflecting the actual battery status.
Someone help, please. This is getting to my nerves already.
Click to expand...
Click to collapse
Format data !

Seems like the only option left
Z750z said:
Format data !
Click to expand...
Click to collapse
I've resorted to doing that, but I have to first find a way to backup my app data. My concern, however, is that being that I don't have OrangeFox/TWRP already flashed and rooted, doing that now might lock me out, as I've read comments, on custom recovery threads, that flashing a custom recovery triggers password/PIN request, and formatting data is the only way past it.
My decision not to modify the phone is hitting me hard, now.

Fixed!
I only charge my battery fully every now and then. I don't usually leave it plugged in up to 90% even. Well, I decided to do that, yesterday—to fully charge it. And voila! At 90%, a notification came in that said something along the line of: 90% charged – features enabled (unrestricted)
The notification came from "Battery Saver" but not MIUI. Seems to be fragments of AOSP, can't say for certain, but when I tapped on the notification, it just opened a blank (white) screen. And trying to open the app info reveals it as the "Settings" app.
I had the hunch that it could be caused by remnants of AOSP—one of the first things I tried was use Nova launcher's activities shortcut to see if I could get an activity that points to AOSP battery saver. Then I also used "Hidden Settings For MIUI" to run advanced search for "battery" and "saver", but got no result.
I'll monitor to see if it would come back, in which case I'd try to clear settings app data, and hope that it'd get rid of it entirely.
MIUI 11 based on Android 10 has really got the phone performing nicely again, something MIUI 11 pie update wrecked. The update before this one, MIUI 11.0.6.0, was the worst OEM update I've ever had since I started using Android back in 2012. Just horrible performance, considering the specs of the phone.