ZenFone Zoom (ZX551ML) Official Firmware Download Only Here !!!

[GSM KING MAKER]

ZenFone Zoom (ZX551ML) Official Firmware Version WW-4.21.40.209 (Android M) 2017/01/20


WW-4.21.40.209 (Android M)​

1. Update bluetooth version to V10.00.02 for BLE_peripheral_mode
2.Update security patch
3.Fix low-latency playback distortion.

 

[GSM KING MAKER]

ZenFone Zoom (ZX551ML) Official Firmware Version JP-4.21.40.209 (Android M) 2017/01/23


JP-4.21.40.209 (Android M) ​

1.Update OS to Andorid M
2.APP2SD won't be supported in Android 6.0 (M)
3.Please backup your data before upgrading