The forum will not allow numerical searches, so... I have stayed at 3.1.2 to keep my free internet tethering, but would like to know how I can get into the "4s". 4.2.1 seems to be where I can end up with an untethered JB. I have downloaded the 4.2.1 restore.ipsw. Via tinyumbrella I have found that I do in fact have the 4.2.1 blob saved, as well as several others. Can I create a custom 4.2.1 firmware with PwnageTool and preserve a non-ipad baseband and go straight to 4.2.1?
