I recently got a locked Sprint Galaxy s4 SPH-L720. I bought it to unlock it and then use it with a CDMA carrier in India.
following an you-tube video (used website too), I was able to unlock the phone.
After following the steps, I was able to unlock the phone for GSM.
But as soon as I put a CDMA sim card...It displays "Invalid Sim"
Can someone please suggest something to make it work for CDMA too. I changed the network settings from GSM to CDMA but that didn't help too.
Any suggestions are welcome!