yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi 4] sah20089:
Dont wipe system partition... Flash miui over Android N or O roms...
[ONE Q&A, Help & Troubleshooting] vivekadithya:
Hi All,

I got my OPO installed with Cosmic OS through a friend few months back, and my Phone started giving out troubles off late. I never had the experience of flashing phones. To start my device fresh, I did a complete factory reset without knowing the dos/donts of a custom ROM (Deleted all the data without backup), and it screwed up my device.

After Factory Reset:

Most of the apps don't work

Not able to access the internal storage. Could see the internal storage through Settings > Storage, but not able to access through files explorer application.

Device getting detected in my comp. while connecting through USB, but its empty. Not able to transfer data either.

Is there a method I can recover my storage and reinstall a ROM?

Thanks, Vivek
[ONE Q&A, Help & Troubleshooting] Mr.Ak:
I think you might have unintentionally formatted your internal storage.Do this: Power off your device>Press Power off+vol down buttons simultaneously until you see 1+ logo,you'll be greeted with twrp splash screen after that>Select Install,and see if your files,that were in internal storage before,are still there or not(see attached screenshot).If they aren't there,I'm sorry,but there's no possibility of getting your files back now.

Now,to flash a new ROM,see rom threads and there should be instructions in first post of that thread on how to flash.After done,blame your frand for all of this. :p
[ONE Q&A, Help & Troubleshooting] vivekadithya:
Hey Mr. AK, thanks for sharing these steps. But unfortunately I dont see TWRP splash screen opening in Reboot. However, it opens in CyanogenMod Recovery mode. While doing my full factory reset of my device earlier, I remember deleting TWRP and GAPPS from the device(Unknowingly).

I now installed TWRP app through app store, the following are some things I saw after installation

When I select TWRP Flash from the home screen, it opens a the next screen with a pop up notification at the bottom saying 'Device Not Rooted'

When I select Reboot option through the options pane on the left, and then select REBOOT Recovery, it doesn't reboot.

I'm not able to downoad the TWRP image for my device as well.

Is there anything that I could do from this state?
[ONE Q&A, Help & Troubleshooting] Mr.Ak:
https://xdaforums.com/oneplus-one/help/flashed-twrp-recovery-cyanogen-recovery-t3696525
[Android Q&A, Help & Troubleshooting] Xellos0:
I changed the digitizer and display in my phone. The digitizer seems to think its resolution is larger (1080x1920) than the real display resolution (720x1280), so my touch is misplaced. I know how to change the display (physical) resolution using wm size, but that scales the digitizer resolution proportionally.

How do I change the digitizer resolution?

Output of dumpsys SurfaceFlinger: pastebin.com/gXnfxJKv

Output of dumpsys display: pastebin.com/bwkjXHxH

(The phone is Lenovo A7000, but that shouldn't matter. The error persists after upgrading firmware, rebooting etc. I haven't flashed/rooted - yet.)
[Android Q&A, Help & Troubleshooting] ramiabouzahra:
After using adb shell wm size ----x---, did you try adb shell wm density ---? Density is basically the dpi of which the device will utilise :)

Good luck.
[Android Q&A, Help & Troubleshooting] Xellos0:
Thanks, but yeah, I tried and it doesn't affect the digitizer resolution either, none of the wm options do anything worthwhile.

It seems I need something like a way to change sizes of SurfaceFlinger layers.
[Android Q&A, Help & Troubleshooting] ramiabouzahra:
SurfaceFlinger is integrated into the GPU if I am correct, so good luck with changed that :p

Other than that, at the time of writing, I can't come up with a solution.

Wish you best of luck :)
[Android Q&A, Help & Troubleshooting] OJKLLC:
Just going to add that I have a similar yet different problem to you.

The similar part is I too also need means to change digitizer resolution but instead of going from 1080p(FHD) down to 720p(HD). My scenario needs to go from 1080p(HD) up to 2160p(UHD)

So I'm just adding more traffic in hopes people know of commands specific to the digitizer or a method to locate & modify files which report the device as only 1080p to most apps

See I've tried Shell/ABD commands but unlike most phones giving my phone a command to report itself as 4K to apps is creating an issue because seemingly even though the device knows it's 4K it reports to itself/apps as 1080p so my the digitizer is running itself as 1080p even though the hardware is sending a 4K signal to light the screen even if most times what's displayed is simply 400% 1080p

If anyone knows what files to get to (as well as how) I as well as OP can manually add the appropriate values to use the correct amount of our screens whilst utilizing the correct resolution, because like he said the PDI stuff isn't related to digitizer only display scale, we need digitizer scaling
[Android Q&A, Help & Troubleshooting] OJKLLC:
& to clarify when in 4K all the time mode with the ABD/Shell command it's not like I can use the whole screen to touch but it'll scale that touch to 1960 by 1080, not the touch for my case is 100% accurate to where I place my finger, issue is that its only sampling 1960 by 1080 of the pixels aka just 1 corner so only useable quarter of the touchscreen with the other 75% completely dead
[Android Q&A, Help & Troubleshooting] vokdals:
Did you find the solution?
[General Questions and Answers] Matt-dp:
Hi, I've searched and seen many posts on slow sd's, and separately many posts on sd corrupting pics and vids, and I seem to be observing both.

The sd card is a 95mbps Samsung (uhs-1 class 10 u3) , phone is an lg g6. Phone is fine (non rooted), and all apps were working fine. Then when I started pointing apps to the SD, I noticed transfers were extremely slow (I'm only getting between 4-10mbps up and down), and in some cases things were breaking like vids, pics, and off Spotify not loading, line map downloads failing.

Ithink what is happening is the os or the SD formatting with a low buffer, is causing the low speeds, and then the apps can't handle the slowness somehow. Like if I take 10 photos quickly and video, the buffer to storage is so slow that it thinks they've failed or something.

Anyways, would appreciate any help because I feel like I've just wasted 40 dollars on an SD card.

On a side note looked wide and far to find out the G6 sd specs, to no avail other than a forum poster saying their device took the uhs-1 class 10 ok.
[Xiaomi Redmi Note 3 Questions & Answers] Lewis_eds:
Hi,

Which ROMs can I use after unofficially unlocking my bootloader? Thanks
[Android General] MotoJunkie01:
ZTE Blade Vantage (Z839)

Verizon Wireless (Prepaid)

Specs & Information Guide​

The ZTE Blade Vantage (Z839), released by Verizon on October 5, 2017, is a budget smartphone packing a ton of mid to high end features, and is Verizon's very first LTE only smartphone. The Z839 has the following basic specifications:

Android Version: 7.1.1 Nougat

CPU Platform: Qualcomm Snapdragon 210 (MSM8909)

1.1 GHz Quad Core ARM Cortex A7 (32 Bit)

GPU: Qualcomm Adreno 304

Display: 5.0" TFT (FWVGA) LCD, 196ppi (480x854)

Battery Li-Ion 2500 mAh Removable

23.4h Talk; 312h Standby

Storage: 16GB (Supports up to 256GB external micro SD; OTG USB support)

RAM: 2GB

Weight: 5.29oz (150 g)

Connectivity: Qualcomm X5 LTE Modem

LTE Bands 2, 4, 5, 13 (LTE Cat 4)

Band 2 / 1900MHz (PCS)

Band 4 / 1700MHz (AWS)

Band 5 / 850MHz (Cellular)

Band 13 / 750MHz (Upper 700)

Bluetooth: 4.0

SIM: Nano

Headphone: 3.5mm Jack

Telephony: HD Voice; VoLTE; WiFi Calling

Camera 8MP Rear; 2MP Front

As to the filesystem of this device, the Z839 operates on an SD/eMMC partition type. The 16GB eMMC is comprised of a 3.5GB /system partition, a 2GB /cache partition, and an 8.7GB /userdata partition, all formatted by way of the ext4 file system. In addition, the eMMC is formatted with 27 additional partitions for various system and radio firmware functions (/modem, /boot, /recovery, etc.).

Initial inspection of the Z839 indicates that, following Verizon's typical policy, the bootloader is locked. I have not yet explored possible exploits or manufacturer support forums for unlocking the Z839 bootloader. Regarding root access, the Z839 features an Android 7.1 1 Nougat build which does not appear vulnerable to the typical one-click root methods, such as KingRoot or KingoRoot. Thus, in theory, and by a plethora of personal experience, it will be almost imperative, in order to gain root access of the stock OS, to unlock the Z839 bootloader. Subsequently, flashing a custom recovery should be possible. Then, a SuperSU or Magisk systemless root package may be installed from custom recovery to achieve superuser access of the stock Nougat ROM.

Because the Z839 is a newly released smartphone (October 5th, 2017), development on the device seems to be in the very early stages. For the price, my personal experience with this phone has been absolutely great. I intend this thread to be a gathering place for interested developers, contributors, and enthusiasts to explore, hypothesize, theorize, and eventually develop custom recoveries, ROMs, kernels, etc., for the ZTE Blade Vantage (Z839).
[Android General] Astr4y4L:
Oh hell yea !!!

OK I don't Have the Device Yet...

BUT I am here and Team_Astr4y4L's Got your back!

Brother If you need anything from us over here you just name it and we're on it !!

Attention XDA Take notice; you have in your presence the Koolest Tower-climbing Rom developer I know !! If it can be done [MENTION=7383447]MotoJunkie01[/MENTION] with the help of his Friends will make it reality !!!

[MENTION=7383447]MotoJunkie01[/MENTION] Brother we will be watching this closely...

you know how we feel Over here about Big-Red ... LOL

:cowboy:

Astr4y4L

Team_Astr4y4L
[Android General] MotoJunkie01:
As always, your continued support and assistance are beyond value. By the way, you may know the answer to this. I have a new BLU Studio M4 with a Spreadtrum sp7731 processor. I'm having trouble finding proper USB drivers for my Windows 10 PC. Are you familiar with this chipset?
[Android General] Astr4y4L:
you can try to follow this Here

https://forum.hovatek.com/thread-827.html

it deals with

[Tutorial] How to manually install Spreadtrum USB drivers on a Windows PC

wow copy past was kinda size-crazy there ...LOL

but it's dated Oct 2013

but again,

it references in first paragraph

Disable driver signature verification enforcement if using a Windows 7, 8, 8.1 or 10 PC (see https://forum.hovatek.com/thread-752.html )

SO maybe this will work for you Bro.

IDK not familiar with the platform personally but I do Know

WINDOWS-BLOW's ..

noticed that it's also used in several of the newer Samsung devices also...
[Android General] MotoJunkie01:
Thank you. Yes that did work. Disabling kernel signing was necessary on my Windows 10 (64 bit) setup first.
[Android General] Ubervillin:
Well I tried.

Okies so I did actually try to unlock the bootloader. I plugged it in then used the

adb devices

command, it showed up so then after trying

adb reboot bootloader

it just booted regularly. So I decided to use

adb reboot recovery

, it went into recovery mode. But when I tried

fastboot devices

nothing happened. I then tried to put it in to bootloader mode using the key combo and still

fastboot devices

did not do anything so this leads me to believe that for some reason the fastboot command doesn't recognise that there is anything attached. Not sure where to go from there, so I am calling it a night for now. I will likely try again sometime tomorrow or the next day as I have them off. Good luck to anyone who tries after this post.
[Android General] MotoJunkie01:
Yeah, just like LG, ZTE oftentimes disables fastboot mode on their devices, making it all the more difficult -- if not nearly impossible -- to unlock the bootloader or achieve systemless root. If I can find stock firmware for the Z839, I will try to reverse engineer the boot chain, and try to find a workaround to get into fastboot.
[Android General] Weegee1:
Hello I have the ZTE Blade Vantage (z839) and when I click activate account on Message+ it says please wait starting service for like a second and goes off. It never activates. Please help
[Android General] George_Jetson:
Hey [MENTION=7383447]MotoJunkie01[/MENTION],

Any more news on this device?

Team Astr4y4L's looking at it again.

I'm doing Gofer Work.
[Android General] RebuffedRacer13:
[MENTION=7383447]MotoJunkie01[/MENTION]

How far is the development going on for this device and also does any know how to root this device?
[Android General] George_Jetson:
from what I can tell Root will require some sort of exploit to unlock the bootloader.

it's msm8909 so there may be a firehose file for another zte msm8909 device and that may let us play with QFIL and QXDM.

I am digging everywhere trying to just find a stock firmware file for it. and coming up empty
[Android General] MotoJunkie01:
Yeah, due to its locked down bootloader and lack of factory images, development has failed to get off the ground for this device. Shame too, it has great specs for a budget smartphone. I'm pretty sure there are some available firehose files for the Qualcomm chipset. I had the same thoughts. If the stock boot image could be patched for systemless root, there is a chance we could push the patched boot image with QFIL. But where to get stock images is the key.
[Android General] xpens:
Hi, ZTE BLADE VANTAGE only comes w/ LTE Mobile Network Settings. I'd like to know if it's going to be posible in the future to change this option to Global Setting (and how?) so it could be use internationally. Thanks..
[Android General] deadman96385:
Here is the B20 firmware package (Z839V1.0.0B20) it also includes the firehose for this device allowing you to use QPST/MiFlash to restore your device or to flash custom boot.img's among other things.

https://www.androidfilehost.com/?fid=1395089523397895595

Separate download with just the firehose, rawprogram0.xml, patch0.xml

https://www.androidfilehost.com/?fid=1395089523397895596

I have also uploaded a few other tidbits that aren't super useful but maybe will help someone down the line:

Verizon Repair APN tool (Could be useful if you break something)

https://www.androidfilehost.com/?fid=1395089523397895588

ZPST for the ZTE MultiDL Tool (Not useful unless you have the ZTE MultiDL Tool)

FRP/Kill Switch Reset tool (Requires License file so not useful)

https://www.androidfilehost.com/?fid=1395089523397895587
[Android General] HyperNyan:
Any updates on this device?

It's been a while since this device has come out, and now we have more available files for it. Is anyone interested in looking into maybe rooting this device?
[Android General] pwnerize_me_cap'n:
Would be super awesome if someone could root it!! If I was any better at this I would give it a shot but I am not there yet lol!
[Android General] Willyjaggz:
When I power on my zte z839 am stuck on bootloop,and even when I plug my charger my phone powers on and sticks on bootloop. I need a solution pals. Moseti(Kenya).
[Android General] HyperNyan:
Hey everyone. It seems that there is now a bootloader unlock for this device. Anyone want to look into this?

https://xdaforums.com/android/software/bootloader-unlocking-qualcomm-zte-t4100897
[Android General] FatalityTheYeet:
still no easy way to root this device? or any successful way?
[Android General] agt.short@gmail.com:
Hey everybody! Thanks for your help in advance. I also have the ZTE Z839 and I want to use it with a carrier other than verison when I try to unlock the phone, it asks for a verification code. I got the code from cx service however it said incorrect code. The cx rep. had only 1 code and it didnt work! then he simply said either I can get verison service or the phone is incapable of using on other networks......... Duh why would there be a option in settings to use with different carrier and ask for a code if it is incapable? I tried tech support also to no avil. Ive spent hours on hold with cx and have troubleshot in every way I know how. Can anybody confirm if this is even possible or not and what is the code or should I just give up?
[Android General] PrivyetCyka:
im totally guessing here but i was messing around in the qualcom flash loader and it pulled some file from the processor that said magic number 262626 i have no clue but its worth a shot
[Android General] HunterAnderson:
Has anyone rooted it? I saw the bootloader unlock thread but ran into an issue when trying to edit the .bin file. Was wondering if anyone got it to work. Thanks!
[Android General] Matcool13:
I need help. I have got a ZTE Z839 initially locked to verizon network. I managed to access the sim unlock code, and it was accepted when I entered it. However when I insert another sim, there is no service and still get the notification that sim is not from verizon wireless. Does anyone has an idea of how to fix this?
[Android General] Jnrach2017:
I want to start out by telling you guys this site for years has helped each other unlock bootloader, root, Roms, boot animations, magick, etc... Now I have done many different methods bypassing Google FRp, bootloop, .

Now I found this zte z839 in my barn from a prior tenant and performed frp bypass. Now I would like the most detailed step-by-step instructions on how to unlock this bootloader, flash custom Rom or magisk etc.. Preferably if possible a method without having to USB to a pc. Please reply to me by email jmrmbz2016@gmail.com. Also any correlating videos would be a great help
[Android General] nirwin:
Was anyone ever able to get this to work for this device (the ZTE Blade Vantage Z839)? I tried going through the steps in that linked process, and kept getting stuck at the partition manager step. There's no popup window with the option to choose a the devinfo partition. If anyone did get this to work -- or found another way to unlock the bootloader on this device -- please let me know!
[Android General] luridphantom:
so deadman posted a rawprogram and patch xml in addition to the firehose earlier in this thread that i liked. download those and select them in qfil and the partition window should come up for you
[Android General] Slooney:
I have an old blade zte z839, actually my hubby and I both had one. I turned one on, that had been reset, thinking it was mine. It asked for the Gmail account, which I put in mine. I knew it wouldn't completely activate, but just wanted my Gmail back in it to be able to use the play store to download one of the security camera app's and use the phone for the camera. Well it put my Gmail but his #.. Wasn't my old phone... Was his.. I worked for Verizon yrs ago and we would manually program phones just to put the phone # in them and then activate them in the system. This was mostly done this way on the "dumb" phones as we called them before all the smart phones came out. I know there is a way we got into some of the first smart phones we sold before leaving the company in 2010 by pressing volume button and power? I'm thinking the code needed was six "zeros" But can someone help me with this to change it my # this way so I can use it please. We have have stuff stolen and can't afford a big system right now so wanted to use the phone for now... Thank u in advance....
[Android General] sidskilly:
I edited the boot loader and patched it back to the z839 but have no idea how well it has worked it is not rooted and well I am stuck lol any idea's?
[Android General] luridphantom:
use qfil to read your boot img and patch it with magisk then flash it back for root
[Android General] sidskilly:
lol i cant get it to read now at all, im lost, good thing mi pixel5 is coming tomorrow lol

im just playing with this phone cause i love to do this stuff, started repairing tv's 42 years ago I was ten at the time and they were tube tv's as well
[Android General] sidskilly:
ok take that back used a different computer, much better now, so when reading the boot loader at 0x0001c000 edited per instructions, then about at 0x0030000 says not much, then both 8192 bytes, then boot at 0x00060000, and recovery at 0x00078000 both 49152 kb, so mod which one lol?
[Android General] sidskilly:
never mind made it way to complicated for myself, i got it done and installed rooted!

nice advice Mister! now on to modding twrp and making this perm.
[Android General] luridphantom:
mind posting a tutorial? for some reason i had issues following https://xdaforums.com/t/bootloader-...vices-devinfo-partition-modification.4100897/ to bootloader unlock my device. only way to bring it back was to use miflash with some zte dfu tool

did you hex edit the aboot.img or boot.img?
[ONE Q&A, Help & Troubleshooting] benyben123:
Hi there.

Fairly new to this, so I was wondering which one should I choose.

BTW - camera quality is important to me (since today was the first I hear that camera quality has to do with ROM).

Thanks
[ONE Q&A, Help & Troubleshooting] Mr.Ak:
Not really ROM specific,but camera blob/hal specific.I'm not really sure what you're trying to ask at this point-"Marshmallow vs. Nougat?" Or "Best ROM for camera point of view?". ?
[ONE Q&A, Help & Troubleshooting] r0tati0n:
I think he is on Sultan 6 because of the camera quality/blobs.

I think he wants to ask if Sultan 7 or other recommendable Android 7 ROMs have the same good camera/blobs.
[ONE Q&A, Help & Troubleshooting] FSadino:
Try this one Unofficial Omnirom

It doesn't have "The perfect camera" but, in my opinion ( im suspect..) is the best in nougat branch.
[Xiaomi Redmi Note 3 Questions & Answers] shanemod:
I have been thinking of this question before but forgot to ask here. I am wonder what is the reason none of Custom rom for RN3 equip with OTA update function. Miui got the OTA update and can be update with as little as 12mb update.

Custom rom on the other hand need to download whole big ass rom everytime there is an update.

If there is a small update file size then we could save so much data and space to upload and download the update.

May i know the small update files never exist in RN3 Custom scene while Miui xioami can have as small file size update for its rom.
[Xiaomi Redmi Note 3 Questions & Answers] corkiejp:
With Lineage OS, you can use an app to get 'Delta' (~OTA file) updates.

https://play.google.com/store/apps/details?id=com.paolinoalessandro.cmromdownloader

Premium: - https://play.google.com/store/apps/details?id=com.paolinoalessandro.cmromdownloaderadfree

Don't use it myself as I prefer to get full image, then if something goes wrong, I have the full image to flash.

Edit: - [MENTION=7771496]shanemod[/MENTION] noticed from your posts that your using LOS, so above app may suit you?
[Xiaomi Redmi Note 3 Questions & Answers] hasan4791:
Reason being why OEMs use OTA to push update is, they don't want users to download full update from the website nd flash it... It will lead to many issues... Many users create different issue and its not easy for them to give a fruitful experience to users... When you talk about Custom roms, user must have basic knowledge of what he/she is doing and before you flash custom rom, you make lot of research in reading... So eventually its easy for you to flash a update via recovery and forum developers need not to work on OTA related issues and so soon... Plus all users are not using the stock kernel.. So it has dependencies too... To push incremental update via ota is not an easy task... Dev neeed to spend critical time on writing scripts and there are majorly time constraints also... So they prefer the easy way... Hope it resolved you query why no one is providing OTA on custom roms...