All new iPhones being sold in the US, UK & Germany are locked to a particular provider (Version 1.1.2, Bootloader 4.6)
Ifyouwish to use the iPhone with another provider in that country orinanother country, you will need the Free SIM (Gen 4) to bypass the locktowork with your existing sim card.
It will unlock all region Iphones example USA, Germany, UK...
Also works with: AT&T,T-Mobile, Vodaphone, ORANGE, Mobile , O2, Tesco, CosmOTE, Tim, Virgin& manymore networks all over the world with any Sim card.
JustJailbreakthe iPhone, update it, Jailbreak it again, insert your Simcard togetherwith the X-Sim (Gen 4), & you phone features willwork on youriPhone. Very simple to do, & you can not damage yourphone!!! Free SIM(Gen 4) requires no modification of the baseband on yourphone