You are comfortable with command lines, you want Android 14/15 features, your phone is out of warranty, and you don't mind using GCam for photos.

: Rooting (e.g., via Magisk) is usually required to bypass SafetyNet/Play Integrity checks so banking apps continue to function.

: Known for high levels of customization built on top of LineageOS, though availability may depend on specific regional variants. Essential Pre-Installation Requirements

If you decide to proceed, check specifically for the Xperia 5 III (codename "Bangkok"). Look for threads by recognized developers.

. While Sony’s official support has transitioned, the community provides several ways to keep the hardware relevant. Available Custom ROMs : This is the most stable and popular option. It is officially supported