After being happy to finally get the Gingerbread update I've now found out that it's broken the sending of SMS messages, they'll fail every time with 'message not sent' if packet data is enabled, disable packet data and they go through fine. This is the same on both mine and my wife's phone and with either the stock Messaging app or Handcent. Model: Samsung Galaxy Ace GT-S5830 Firmware: 2.3.3 (CPW) - Official through Kies. Network: T-mobile UK I can find several references to the issue online but none with any sort of conclusion as to the cause and fix (best I could find was a convoluted method that involved automatically disabling packet data when in the messaging app - novel but not an acceptable solution). Does anyone know how to fix this properly? I don't want to do a factory reset unless it's a definite fix as it'll take ages to set everything up again.