Unlocked S4 hotspot isn't working with international sim
Attempting to use the hotspot I get the message "mobile data is unavailable or sim invalid"
After sending in the proper request, AT&T unlocked my old samsung s4. I wanted it unlocked because I spend a lot of time in Thailand and needed a phone to use. I purchased a dtac sim [thai network] and basic functions work. I'm able to receive and make calls, use data, etc. But the hotspot won't work! I've looked online and it seems like a lot of other people have this issue. Most of them ended up rooting their phones [not sure what that is]. I don't understand, my s4 isn't on a contract with AT&T anymore [ i upgraded to LG G3], and my hotspot worked fine before.