Professional unlocking chip Unlock your iPhone for 1 carrier of your choice - you can only use 1 wireless company gsm only of you choice So let's say you have a Sprint iPhone BUT you have TMobile service, this chip will make it happen. Everything will work perfectly Once your iPhone is unlocked you can use any carrier except Verizon or Sprint services. No iCL0UD locked iPhones No L0ST iPhones No ST0LEN iPhones 1 chip per phone ONLY iPhone MUST be updated to the latest ios how does it work? It’s a chip you put next to your SIM card of your choice and you’ll get signal. Can I do updates? Yes you can, won't effect your unlock Does the chip stays inside all the time? Yes, it needs to remain inside at all times to keep your unlock