1.Incorrect upgrade will damage your device.
2.Please upgrade your device by cable connection.
3.Only firmware version H3_V3.X.XX can be upgraded to this firmware.
4.Do not power off the device when upgrading.
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.