You must have TWRP (Team Win Recovery Project) installed.
A: No. Because you unlocked the bootloader, SafetyNet fails. You cannot use contactless payments. Some banking apps (like Chase) will refuse to run. Use the mobile website instead. samsung galaxy s2 android 13 free
Yet, in the underground world of Android development, the S2 is a vampire—it simply refuses to die. The concept of the Galaxy S2 running Android 13 is not a manufacturer update; it is a digital resurrection, a testament to the power of the Custom ROM community. You must have TWRP (Team Win Recovery Project) installed