I don't know why there is NFC logo, because there isn't NFC .
In all case, the "International" version use a different Firmware than "Chinese" version, and the only Firmware is 1.13.58, so you can't update it, and you can't install my custom Firmwares.
Just in case if somebody will be interested: there is a new application from 4pda team that should be fully compatible with your firmware: HeyPlus_22.214.171.124_IY_v1.1.apk
List of modifications:
RU\EN language switch
Google maps instead of china maps
Notification filtering to remove duplicates
Alarm name length fix
Weather for all countries. Weather language will change depending on app language.
UPD: it seems that there are still couple of problems with compatibility. The main one is that firmware recovery process is blocked differently. For 4pda firmware it is blocked in firmware itself, not in application. So after some times it is possible that 4pda will start recovery and corrupt so resources in firmware.