Upgrade Notes:
1.This firmware is only fit for i21v1.0 and its firmware version must be in V1.0.0.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.Solved the issue that wireless function will disable when router deploy 2.4GHz policy and 5GHz policy separately to AP.