Upgrade Notes:

1. This firmware is only fit for 4G03V3.0 and its firmware version must be in V04.03.01.XX 

Note: Please confirm the hardware version in device GUI: Basic Information->Hardware Version before upgrade

2. Do not power off the device when upgrading.

3. Please unzip the file you downloaded and use the file ended with "bin" or "trx" to upgrade your device.

4. Please reset it to factory settings after upgraded it.

Release Notes:

1. Fixed a bug where network configurations might be lost under certain operations. 

2. Improved the accuracy of network connectivity detection.