Tablet stuck after mounting /system as writable - Android Q&A, Help & Troubleshooting

I have a chinese Allwinner/Softwinner Quadcore A33 1.2ghz 9" tablet with chipset astar-rtl8703 which I think I bricked.
What I did:
- tablet was infected with trojan/virus, impossible to remove by reset to factory settings (virus is in /system)
- I rooted the tablet with Kingo Root
- tried to remove virus with Lookout, Malware Bytes and Stubborn Trojan Killer. They failed.
- tried to delete the virus with Titanium Backup. Unsuccesful.
- used adb shell to manually mount the file system as writable and tried to manually delete the infected files from /system. Failed with message "Operation not permitted".
- after restarting tablet it is now stuck with displaying text "android" in the middle of the screen.
I didn't find the button/key combination for doing a hard-reset. Do you know which are ?
Where can I find the ROM/firmware (even a custom ROM, or anything compatible) so I can try reflash ?
This is what Phoenix Suite detects:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
[/IMG]
Thank you for your help.

Related

4.3 + root = dont want ecrypt

Good day!
I have a strange problem, After upgraded from 4.1.2 to 4.3 (i tryed XWUGML4 and XXUGML2) and rooted device (from odin PC)(used I9300-4.3_ml2-CF-Auto-Root.tar.zip and other) i cant encrypt device.
My steps:
1. Wipe data/cache
2. Install 4.3 (odin PC)
3. simple configure
4. Install root (odin PC)
5. Install password on lock screen
6. Plugin power cable
7. Try encrypt
8. Phone was reboot and nothing. Phone asking password only when it complete booted.
9. Go to security menu and see what phone is not encrypt.
When i was install 4.3 and try encrypt phone i have no problem.
I think what when i install root something goes wrong. Maybe root change files. At 4.1.2 i dont have this problem
screen
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
upd. after permanent delete root encryption is work(

[Q] [MT6577] Can't partition unsafe device /dev/block/mmcblk0p1

Hey guys..
I have been using Noir A8 which is another MT6577 device. I have been going through different ROMs (4.0.4, 4.1.1, 4.2.2) but never had any problem migrating between them.
Few days ago, the phone (Android 4.2.2) just hung up and upon restarting, it just stuck at company logo!
I first thought that ROM might have got corrupted, so flashed 4.0.4 with CWMR, but that didn't work out. Still that same logo.
I tried formatting internal storage partition which I read at XDA, but when I tried to push files in /sbin/, it said READ ONLY FILESYSTEM!
Even remounting system as RW from adb shell is not working.
When checked the log CWMR, it said:
Can't partition unsafe device /dev/block/mmcblk0p1
and can't mount external_sd
Flashing ROM from SP-TOOLS is also not working as mobile is always getting stuck at same logo screen whatever I do.
It seems that I can't flash ROM or push files because system has become read-only!
Any help from Android DEVs will be extremely helpful.
I am an iOS dev and have got some knowledge of Android but this has made me crazy as HELL!
CWRM log:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
​

Hot to copy back deleted files if only sideload mode is available?

I ran into a faulty.
I deleted 3 files from /data/system
- locksettings.db
- locksettings.db-shm
- locksettings.db-wal
I made a backup earlier, but my phone does not want to boot up.
I want to copy back these 3 files, but only the recovery mode came up,
with "sideload mode".
What can I do?
Is there a way to make a .zip to push to the device?
(Pushing with "adb sideload filename.zip" is working, but the installation is stoped all the time, because the verification...)
Please help!
ps: I used this method to get rid of screen lock with VPN:
https://forum.xda-developers.com/showthread.php?t=2666126
.... this lead me to this hell
Sorry, I shoukd write the title "How to..." not "Hot to.."
So I solved my problem.
I used original boot loader, recovery.
So I updated with ClockworkModRecovery, then I got adb shell with root privileges.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
With the pull and push commands I could restore the (almost) original status.
I say "almost", because before that, I tried to relfash with the original firmware,
so all my "factory defaults and programs" came back.
That was a big rush for me....

Memup SlidePad 816P - Alwinner A20 weird bootloop

Hello, so 1y ago i tried to root an old tablet of my sister from her middle school, with all the school bloatware on it and it worked, and one time i messed with the recovery and when i rebooted the tablet, its like it was never used and i can't even install a Developer Shortcut app because it tells me that there is no space available (its force to install to the 1gb rom and not the integrated sdcard of 10gb for apps and data, here named SP816P).
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
the thing is that there is a lot of space and i don't understand that sh*t, and if u ask me why i'm trying to install a developer shorcut app is because the developer options are activated but hided in the settings menu so the only way left is to use an app. Anybody here know how to activate ADB so i can flash the tablet with PoenixSuit and a compatible stock rom?
here is screen of the ES file explorer pre-installed on it
Thanks for reading this thread and maybe help me, bye!
nevermind, locking this post because the screen has just broken, only a half of it work... i don't event know how i manage to broke it

BLOW ZQNBLOW Smart TV Android Box - How to restore su

Hardware & software spec:
ManufacturerBLOWNameSmart TV Android BoxModelZQNBLOWChipsetAmlogic S905W 4-core ARM Cortex-A53GPUMali-450 MP, OpenGL ES 2.0 9d52114EMMC ROM16GBDDR RAM2GBAndroid version9API version28Fingerprint partAmlogic/p281/p281
9/PPR1.180610.011/20210426
SU is available in the original firmware using ADB. I started to combine something with Magisk, but it was not possible to install and an error appeared:
Code:
FBE found but FBE support not present in TWRP
I decided to uninstall Magisk but now I don't have SU in ADB:
Code:
adb shell
p281:/ $ su
/system/bin/sh: su: not found
127|p281:/ $
How to restore SU?
I tried to restore the boot partition using a previously made backup in TWRP but it doesn't help :-(
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Unfortunately, I did not make a copy of the system partition.
Where to download stock firmware?
Could someone make a copy of the system partition and send me? Thanks.

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