Firmware signature error



When using the “Zero Config” feature, all phones are receiving their configurations successfully, and reporting back to the UCM, however, on each update, I’m getting a “Firmware signature error”. I’ve disabled firmware updates from the UCM, and the phones have no firmware URL configured.

Does anybody know what may cause this error?


Phone model and current firmware ?


UCM6202 with

GXV3275 with

WP820 with


For 3275 that is standard message, regardless what is set, (i guess this is android thing).
Wp - i do not remember this info at all. But i use dev soft now, so wait for new fw i think.