Nighhawk m1 keep rebooting can't update

I just got nighthawk M1 unlocked but it is not working with the sim.  It keep rebooting even I tried different sim cards, I did factory reset so many times, took the battery out so many times, even run power plug only still in boot loop .  I can't update either it won't download anything frorm server, error update everytime or keep saying CHECKING for ever...

Here is my nighthawk M1 device info, any netgear support team here please check if my device block from updating through your server.

 

IMEI: 353348080659366

SN: 4sc274nc002f3

Hardware version: 1.0

Pri Version: 01.16

Firmware:NTG9X50C_10.12.02.01

GUI Version: MR1HDATA_04.00.45.00

Boot loader version: NTG9X50C_10.12.02.01

Firmware Build date: 2017/01/28