I was using my SGS (i9000 galaxymtd) just for media, internet, game etc purposes, in other words, not as a phone as i own a HOX, however, since i have dropped my HOX a couple of days ago and got a broken display, had to leave it for repair and came back to my SGS. Apart from the spontaneous reboot -on its own- issues which could be endured for a short period of time, but sms (?). I am trying to keep my SGS alive thanks to CM, and now i am really surprised (badly of course) how such an important, even one of the main parts of a mobilephone usage could be disregarded by CM. I have tried the solution adviced above, with no success; tapping on "update" button after entering smsc number turns "error", refresh button puts "00" (doubled zero) into that field, nothing else happens. Surprisingly i can receive sms, but sending is not possible. "Sms service center" should be somewhere in settings in sms application, or somewhere under network settings in general, but no, nowhere. Really annoying. Since i will not use CM as my daily driver, i do not really care actually, but just wondering; 1) is it only me who simply cannot find it, 2) how to fix it?
SGS Galaxy I9000 - Galaxymtd, Cyanogenmod version 10.1.3-RC1