We have the pleasure to announce that we recently released the BETA v355B16 base station and handset.
This version includes a number of fixes and an a bigger multicell capacity.
IMPORTANT: after updating the device to the 355 version you will not able to downgrade to a 324 version.
Release notes page: http://wiki.snom.com/M-series/Firmware/Release_Notes
Firmware page: http://wiki.snom.com/M-series/Firmware