Fortunately for you we have found some easy ways to SIM unlock the Galaxy S4 and you can do it for free. If you need to use a SIM from another carrier with your Galaxy S4, then follow the guide below in order to unlock it. One of them is free and only takes a few minutes, while the other one requires you to buy an unlock code, but it can be slightly easier. Make sure to check all bands, including the 2G, 3G, and 4G, because some carriers use different ones and while you might be able to make calls, the data could not work. How to SIM Unlock the Galaxy S4 This method is totally free, but you have to be careful and follow every step without mistakes, because otherwise you might brick your device. This should work for all variants of the Samsung Galaxy S4, including I9500, I9505, I9506, I9505G, I337, M919, I545, L720, R970, I959, I9502, I337M, M919V, R970X, and R970C. Be patient and press Menu when you can, then Back key ON. Now your Samsung Galaxy S4 should be SIM unlocked. First you will need to find your IMEI code. Then head over to and purchase an unlock code for your IMEI. Another alternative would be to contact your carrier, because it might unlock your device for free or for a fee. If you encounter any issues while SIM unlocking your Galaxy S4, please let us know.