Open your rom with Winrar or similar prog. You must edit the file updater-script. You will find it in Meta-inf\com\google\android. You must delete all the blue marked text. That works for me. My device is 8703F.
OpenGApps.org offers information and pre-built packages of The Open GApps Project. The Open GApps Project is an open-source effort to script the automatic generation of up-to-date Google Apps packages. All Android versions and platforms supported.
Up untill now I don't see any difference. WiFi occasionally drops but I don't remember if previous version was more stable. Nice would be to see a changelog to know what was fixed with the latest update from our russian friends
* I'm not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed (like it did for me...).
* Please do some research if you have any concerns about features included in the products you find here before flashing it!
* YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.
* Your warranty will be void if you tamper with any part of your device / software.
* Same statement for XDA.
LineageOS is a free, community built, aftermarket firmware distribution of Android 10, which is designed to increase performance and reliability over stock Android for your device.
LineageOS is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. Linked below is a package that has come from another Android project that restore the Google parts. LineageOS does still include various hardware-specific code, which is also slowly being open-sourced anyway.
All the source code for LineageOS is available in the LineageOS Github repo. And if you would like to contribute to LineageOS, please visit out Gerrit Code Review.
USB and WLAN tethering
This TWRP build has special function Sign boot which you have to click after install new version of ROM or mod like Magisk. It will append stock boot signature to your boot partition. This allows to boot with locked bootloader.
TWRP with Boot Sign function screenshots:
Fortunately you dont need to unlock bootloader, because not every Lenovo tab can be unlocked. Custom kernel and ROM can be runned by appending boot.sig signature extracted from stock rom to boot.img like