I have recently got an iPhone 3G jailbroken in order to use my O2 SIM in the Oranage phone. I understand that as soon as the phone is jailbroken you can not update the software (it's on version 4.1 currently). Firstly,is there a simple way around this? Secondly,if there isn't,how am I able to use Facebook on the phone? I can't download the app as it requires 4.1 and even using Safari or another Internet browser has the same issue. Thanks for your help!