If you already have the 20180419 ROM installed and are just fixing the bugs, you do not need to wipe your data. In the TWRP main menu, tap .
uses a Spreadtrum chipset, always ensure you are downloading files labeled specifically for . Files for the Wi-Fi-only version ( Go to product viewer dialog for this item. ) may cause a bootloop or "hard brick" your device. Are you having a specific issue with network connectivity battery life on your current build?
If you downloaded a pre-packaged community fix zip for the gtel3g hardware abstraction layer (HAL): In TWRP, click . Select your gtel3g-fix-camera-audio.zip . Swipe to flash, then clear Dalvik/Cache. Method B: Manual File Replacement (Alternative)
The stock camera app crashes immediately upon opening ("Can't connect to camera" error).
Many "bugs" reported in this build are actually results of dirty flashing. To ensure a stable experience: lineage14120180419unofficialgtel3g fix
If the device fails to boot after flashing the patch, the system partition may have become corrupted. Re-enter TWRP, wipe System, Cache, and Dalvik, and re-flash the ROM, GApps, and the Fix zip sequentially without rebooting in between. Camera Still Fails
This is an of LineageOS 14.1—a custom Android distribution that succeeds the legendary CyanogenMod project. The naming convention tells you everything you need to know:
, the community has moved toward newer versions that offer better security and app compatibility: LineageOS 15.1 (Android 8.1) : There are active testing threads on the XDA Developers Forum lineage-15.1-20230821-UNOFFICIAL-gtel3g.zip
Go to Settings > About Tablet. Confirm your model is SM-T561 ( gtel3g ). Do not flash these files on the Wi-Fi-only variant ( gtelwifi / SM-T560) or the Spreadtrum LTE variant. If you already have the 20180419 ROM installed
The camera fails to connect or forces a reboot.
Alternatively, edit your build.prop file located in /system/ and look for the line: ro.telephony.default_network=0 Change the value to 3 (for GSM/WCDMA auto) to force the Spreadtrum modem to register on 3G networks.
Input the following commands sequentially to redirect the captive portal check to functional servers:
If the mobile data is broken, you need to append or replace these with the libraries from a stable firmware build or a RIL fix flashable ZIP file historically distributed on XDA threads for the T561. Files for the Wi-Fi-only version ( Go to
Which specific (Wi-Fi, Bluetooth, Camera) is failing to respond.
to Android 7.1.2 Nougat, but frequently encounters critical bugs during or after installation. Users flashing this legacy package face severe boot delays, persistent Wi-Fi connectivity errors, and data partition crashes. Resolving these issues requires a precise combination of advanced TWRP custom recovery configurations, specific wiping routines, and Android Developer Options overrides. Step-by-Step Installation & Boot Optimization
The 3G modem fails to initialize, leaving the device with "No Service."
Specialist news and analysis,
research tools, and unique data sets
Internet Explorer is not compatible with this website. We instead recommend using Chrome, Edge, Firefox or Safari.
Microsoft ceased supporting IE 10 and older in 2016.
In addition, Microsoft cyber-security chief Chris Jackson has been urging users to stop using the browser since February 2019.
