I have a factory unlocked Samsung Galaxy S4 GT-I9500. The question ~ How to unlock Galaxy S4 SIM for free? does not matter me at all. However, some of you might need to know the answer. This SIM unlock method seems to work on Samsung Galaxy Series. Too bad that I can’t hand-on to try it myself. But that does not stop you from trying it. It works on Galaxy S4 GT-I9505 model. Not sure about GT-I9500 model. Anyway, just try it to find out. Nothing to lose because you don’t need root access to do so.
Interested to unlock Galaxy S4 SIM? Head to XDA Forum (link) to find out more. So far these Telco Galaxy S4 are able to unlock – Three UK, Hungary T-mobile, O2 UK, Orange, Vip (Croatia), Bell Canada, Austrian A1, Rogers…