1.Only firmware version V1.0.0.XX can be upgraded to this firmware.
2.Compatible with HUAWEI E3372H、E8372 data card.
3.Updated APN informations.
4.Add service name 、server name on PPPoe WAN Access Mode.
5.Incorrect upgrade will damage your device.
6.Do not power off the device when upgrading.
7.Please unzip the file you downloaded and use the file ended with "bin" or "trx" to upgrade your device.