I've searched the forums for a few days now reading up on Rooting phones and Custom ROMS. I have a HTC Desire and am considering flashing Oxygen onto it as it doesn't seem as if Desire users are going to receive the Gingerbread update for what could be months, and Oxygen looks very slick and fast from what I've seen on Youtube videos. The only thing that I haven't been able to find out by searching the forums is whether I can still use my 24 month contract SIM from Vodafone with the Custom ROM. I understand that rooting e.t.c voids the warranty on the phone and so wanted to check before I do anything with Custom ROMS on my phone (probably is a stupid question but I wanted to be sure.) Also I was wondering if there was any chance that I could brick my phone irreparably when attempting this procedure as I have 9 months left on my contract and don't want anything to go wrong. I'm new to Rooting phones and so I'm sorry if this is a noob-ish question. Any help is much appreciated. Thanks.