Hi All Some advise please Bought an iPhone last night, and on checking version of iOS installed it appears to be running the latest Gold Master release: Version: 4.2 (8c134) Modem: 03.10.01 Now the questions: 1 - will this expire at some point? Is the date known? 2 - is it possible to Jailbreak this version? 3 - can I revert to an official iOS release (note don't have access to a Mac, but I do have the latest iTunes installed - downloaded last night). Thanks.