Upgrade instructions:

1. This firmware is only compatible with 4G05v1.0, and its firmware version must be V04.05.01.XX or higher.

2. Do not turn off the device power during the upgrade.

3. Please unzip the files you downloaded and upgrade your device using files that end with "bin" or "trx".

4. After upgrading, please reset it to factory settings.

Notes:

1. Optimized compatibility with telecom operators.
2. Fixed some bugs.