Hello.

I'm operating two M700 in a multicell environment. The firmware version of this base stations are 530-02. Configured are 5 M25 devices. Unfortunately delivered with firmware 410-03. If I try to update this mobile device to 530-02, following error occurs:

loc2 .Info  2023-03-01T20:59:23Z 235-[ FWU Downloading File https://dect.snom.com//M25/M25_v0530_b0002.fwu] 
loc2 .Info  2023-03-01T20:59:23Z 235-[ M25_v0530_b0002.fwu: PP FWU info get (ID:d9a008d) error 2157 (HTTP_GFT_SERVER_UNSPECIFIED): HTTP protocol] 

Maybe the gap between installed and new version is too big?
I've also tried to update to lower versions for the M25, starting wicth 410-11.

Always the same problem and the same issue.

My assumption:
It is not possible to update such low firmware versions of the handhelds in combination with the "new" firmware of the base?

Is there any way to install the new firmware on M25?
Can I perform a network recovery for M25?
Any suggestions?

Thanks a lot for any idea or help.