Two new apparent unlocking solutions for Apple's iPhone firmware v1.1.2 have surfaced, allowing owners of the cellular handset to sign up for wireless service with carriers other than Apple's exclusive partners. The new techniques, dubbed SonicSIM and StealthSIM, both claim to unlock iPhone v1.1.2 for use with all wireless carriers that use the same technology as Apple's cellphone. SonicSIM is a special card rumored to partially unlock the iPhone by tricking the device and dual booting operating systems, while StealthSIM is a similar card produced by a company hoping to sell the solution for $90 on eBay.

No hard evidence exists that SonicSIM works or that it even exists, but the firm hoping to sell StealthSIM, StealthSim.com, says it works with all iPhone models in the U.S. as well as Europe. Forum posters say all firmware versions -- including v1.1.2 -- do in fact work, according to iPhoneWorld.ca.