I'd love to know what works for you. SMS works fine, but MMS just hangs. Another question: is it SFOS or the Xperia that requires a reboot if you remove the sim while booted up? Also: anyone have problems booting while a microSD is in the tray? My Xperia will only give the white SONY screen and do nothing else if the microSD is in the tray. Could it be due to the formatting of the card? Even though it works if I insert after booting (but then the sim won't work, and I can't reboot...).