Hi, New here and want to JB Iphone 4 (4.2.1) and have a few q's. Found lots of help in the forum but just want confirmation on a few things; 1. My Iphone designated PC is at work and set to autosync so there will be a back up file on that PC. I am off for this week and want to jailbreak using GP on my home PC, I know you do not need Itunes open to JB and wanted to know if I can do this on my home PC, then when back at work continue to sync/add music etc ? essentially can I JB on another PC than the one Iphone is linked to and not loose any data? 2. After installing GP on my Iphone will I still have all contacts, music etc? 3. Will my phone just work as normal immediately after or do I need to reactivate network etc...? Thanks for any help.