Hi there, all!
This post is about a B315s-22 firmware error. Please see more details below.

ISSUE DESCRIPTION
After the recent firmware update (21.311.03.00.983 -> 21.313.03.00.983) a call to http://homerouter.cpe/api/device/signal returns the xml will all values *empty* except mode (4G, 3G, etc.)!
Is there a way to get the previous B315s-22 firmware or could you communicate this error to be corrected with next firmware update?
Thanks.
