How to Check and Change Current Active Slot on Android [Fastboot

Boot TWRP in slot a; Install LineageOS , TWRP will install it to slot b! Flash to slot b

Card slot microSDXC Internal 64GB 4GB RAM, 64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM UFS MAIN CAMERA Camera 50 MP, f, 26mm (

surga slot 77 Hello,I've successfully installed twrp and rooted via experimenting with TWRP, I tried booting from the 'B' slot Failure, stuck in fastboot

wing slot 77 I'm working with Android 9 Pie and I have one slot rooted and the other is not My reasoning to have my phone this way is