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 lock to work 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 & many more networks all over the world with any Sim card.
Just Jail break the iPhone, update it, Jailbreak it again, insert your Simcard togetherwith the X-Sim (Gen 4), & you phone features willwork on your iPhone.Very simple to do, & you can not damage
your phone SIM(Gen 4) requires no modification of the baseband on your phone.
Unlock SIM card for iphone