Flash custom ROMs (like LineageOS or Pixel Experience), custom kernels, and root packages like Magisk.
Power off your phone. Hold Volume Down + Home + Power (or Volume Down + Power on newer models) simultaneously until the warning screen appears. Press Volume Up to confirm. twrp-3.7.0-9-0
If TWRP asks for a password but yours doesn't work, you may need to format data (not just wipe) or wait for a newer build if your device is newly encrypted. Flash custom ROMs (like LineageOS or Pixel Experience),