Upgrade Notes:

1. This firmware is only fit for M50v2.0 and its firmware version must be in V15.11.0.XX or more.

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. Added Cloud Maintenance for IMS platform.