1.Incorrect upgrade will damage your device.
2.Please upgrade your device by cable connections.
3.Do not power off the device when upgrading.
4.Only firmware version V1.2.0.X can be upgraded to this firmware.
5.Please unzip the file you downloaded and use the file ended with "bin" or "trx" to upgrade your device.
6.After upgrading, please restore it to factory defaults and configure the device again.