I'm using a M15 SC handset on a M200 base station.
This works fine, but the phone is annoying me with the messagee
"No new firmware version." every few minutes and also does
a short beep (it does the same as manually choosing 
"firmware update" in den Admin menu).
I can't find any setting to disable this behaviour. Is 
the handset just incompatible with the base station or is there
a way to disable this warning?
The base station settings have Provisioning Schedule set to disabled,
so this also can't be the cause for this periodic check.

Do I need to throw the phone away and replace it with a M10
handset or is there a way to fix this?