Had an HTC Desire for about 7 months (Alltel/Verizon) and after a couple of months it began shutting itself off - sometimes several times in a row. I have done hard restarts, removed all apps, factory reset etc and none have helped. The activity does not seem to be linked to any one behaviour as it occurs during calls, while sitting not in use or during chats etc. Last week Verizon replaced the phone for me (it shut down 8 times in 10 minutes while they were looking my account up in the store so they really got it!) and when the new phone arrived and I turned it on... it started to do the very same thing again. I am seeing lots of similar posts on hthis and other sites and am looking for any advice you might have. Verizon are not eager to replace my phone with a new model without me paying for another phone, and HTC tells me everything has to go thru my provider. I find it hard to believe there is no warranty which would allow me to receive pro-rated refund on the price to apply to a different phone, or for me to get a different model but it has been hard to get a straight answer. Eagerly awaiting your input!