Install Linux or Hardened Android Roms on a Smartphone

OnePlus 3 A3000

Version: OnePlus 3T

https://oneplus.gadgethacks.com/how-to/root-your-oneplus-3-3t-install-twrp-recovery-0176588/

https://devices.ubuntu-touch.io/device/oneplus3/

https://lineageosroms.com/oneplus3/

https://grapheneos.org/

https://doc.e.foundation/devices/oneplus3

https://calyxos.org/

Xiaomi Mi A1 (tissot)

https://doc.e.foundation/devices/tissot/install

https://xiaomistockrom.com/xiaomi-mi-a1

http://api.en.miui.com/url/unlock

Bootloop after burn stock rom https://forum.xda-developers.com/t/solved-mi-a1-bootloop.3973131/

OnePlus2

https://lineageosroms.com/oneplus2/#installing-a-custom-recovery-using-fastboot

https://www.reddit.com/r/LineageOS/comments/8ujxup/oneplus_2_no_lte_after_update/

https://forum.xda-developers.com/t/rom-ota-oxygen-os-mirrors-for-official-oxygen-os-roms-and-ota-updates.3209863/#post-62973446

References

https://tuxphones.com/