How To Root Galaxy S4, custom ROMs, and more!
For those of you who want to use your Sprint Galaxy S4 SPH-L720 as a GSM worldphone, you can get your unlock SIM code from Sprint.com. Now, sometimes even with that, your phone may not work correctly, here’s how to manually unlock SIM on your Sprint Galaxy S4 so you can use use phone when traveling abroad.
For those of you who want to unlock SIM on your AT&T or T-Mobile Galaxy S4, there’s an easy way to unlock SIM as outlined by XDA user kaleido.
This should work on AT&T Galaxy S4 SGH-i337, T-Mobile Galaxy S4 SGH-M919, and also all Canadian SGH-i337M variants.
Remember, unlocking SIM is illegal in the U.S. as of this year, and that is why I cannot make a video tutorial but this method does work well, you can find full step-by-step tutorial at XDA here. However, it is not illegal to unlock your SIM if you are currently in another country other than the U.S. This law should change soon as it only benefits carriers not consumers.
![How to Unlock SIM on AT&T/T-Mobile/Canadian Galaxy S4! [SGH-i337/SGH-M919/SGH-i337M]](https://galaxys4root.com/wp-content/themes/galaxys4root/img/thumb-medium.png)