Here you will see how see the firmware of TP.MS358.PC821 (For Customer)
As you had seen in the video. That this board had a restart problem
so i did the firmware and the set got ok
and bellow firmware is chargeable (cost 800)
and if you want this pay and try at your own risk
because any mistake in firmware update will make risk your board / led to standby or even dead
http://bit.ly/TP_MS358_PC821_4G Chargeable
YouTube video link
شكرا
This software