Today I've just started having many SMS failures when trying to send via my Desire handset on the Orange UK network. I've put the sim in another phone and the messages send (and receive) fine. I've done a factory reset and still the problem remains - 'SMS unable to send' notification. Eventually on a retry it seems they do send (sometimes coming through twice) but it's something that has only just started happening. As I say I tried a factory reset and the problem remains using either the stock sms client or indeed Handcent. I also noticed before the reset when I restarted the phone it would take upto 5 minutes to achieve any phone signal at all - after the restart it finds it almost immediately. Anyone else had this issue ?