This option is for experienced DIYers. It involves sourcing the firmware files and a license code from a third-party provider.
: Access the Engineering Mode by holding Phone Down + 1 + # simultaneously. Navigate to system information; NTG 4.7 often appears with code "BL NTG 476.23". ntg 47 firmware update updated
: Upgraded CPU handling compared to NTG 4.5, providing a more fluid user interface. This option is for experienced DIYers