Purchased unbranded Desire on Orange two weeks ago, unchanged from original, no downloads, no tinkering with software, no email set up, just numbers imported from old 2g sim onto new 3g sim. Handset occasionally locked up (could not unlock to accept a call, it just kept ringing) when receiving incoming call, rebooted then got error message "sorry, process system not responding" Force close/Wait, either option resulted in several minutes long freeze and reboot, so took phone back to shop. CPW exchanged for new handset (thank you) without question and told me they had sold many Desire handsets, and none had been brought back with this problem. New handset, imported phone numbers, downloaded Advanced task killer free, and some google stuff (new maps - very good). But yesterday, after task killing facebook, I get error message "Sorry, the process com.android.phone has stopped unexpectedly. Please try again". Force close. I have also been unable to hook up my email on either phone, and there is a problem connecting to my mobile network. Orange say everything is ok their end so it would appear to be the hardware. Neither could GeekSquad help. Is it me? Could it be the new 3G sim (common to both phones) could it be the Android software? Could it be the task killer? I've been onto Orange for advice and also to the GeekSquad (paid for tech hotline) and nobody has heard of this before. Except me, perhaps because im geeky enough to spend time hunting for answers on forums like this one. Ive got a new sim coming from Orange in the next day or so, and I'll report back if it makes a difference.