Can I jailbreak a previously activated phone without sim card?

[flyboy320]

I have a used iphone 3G that's locked to AT&T firmware 4.2.1 and BB 5.15. I would like to jailbreak (and unlock at a later time as I will use it in Canada, but don't want to upgrade BB to 6.15), but I want to avoid the battery drain issue. Can I jailbreak without the sim card, and avoid having to hacktivate it?

[James360Petty]

I've never done it but there is a tool called 'SAM' it fools iTunes in to thinking the SIM is inserted..... do a bit of googling or wait for the knowledge to follow!!!

[Goof]

You can jailbreak it with greenpois0n and then wait for a unlock for 5.14.

As for unlocking you can purchase one of those pay as you go plans from AT&T


Sent from my iPhone using ModMyi

[iPittsburgh]

If you need to unlock you have to install the iPad baseband, There is most likely not going to be a "regular unlock" for 5.15.

You will need redsn0w 0.9.6rc8 and a copy of 4.2.1 to jailbreak and install iPad baseband both can be found at iPhone Download Blog

[flyboy320]

OK, thanks guys. I'm not in a hurry to unlock right now, just jailbreak.

Just wasn't sure about having to have an AT&T sim card cause I'm up in Canada without access to that provider (bought the phone off someone in the US from eBay).

Is there anything I should do to the phone before I jailbreak like saving SHSH's with tinyumbrella?

Is there an advantage to using either redsn0w over sn0wbreeze?

After it's jailbroken (not unlocked), can I restore the phone to an "un-jailbreaked" phone (don't know why I would, just curious)?

[iPittsburgh]

redsn0w gives more options when jailbreaking, redsn0w is more reliable IMO, Yes you can do a restore to remove the jailbreak. You can save shsh in cydia after you jailbreak by clicking "make my life easier"