Boot into recovery (typically by tapping Volume Down as the Sony logo appears) and perform a "Full Wipe" including Data, Cache, and Dalvik Cache .
A "Clean Flash" is recommended, which involves wiping the cache, Dalvik cache, and system data to prevent software conflicts. xperia t2 ultra custom rom
: One of the most feature-rich older ROMs that combines features from Paranoid Android, AOKP, and CyanogenMod. It is known for its extensive customization and performance tweaks for the Xperia T2 Ultra Dual CyanogenMod 11 Boot into recovery (typically by tapping Volume Down