The problems started 2 days ago. My phone stopped ringing (goes immediatelly into the voice mail) and I couldn't make any call from it. When I put SIM card into another phne, everything is OK. Also, when I put another SIM card (from anther provider) into the first phone, everything works. Some kind of sudden incompatibility betwen SIM card and the phone? I've been using the same phone for 2 years now (Sony Ericsson W595. Thanks in advance for help.