Mobile Data doesn't work?

[AC Question]

When I have my sim card on my old phone the mobile data works fine and when i put it in my Samsung S4 it wont work, I've tried Soft reseting it and just turning it off and on, any suggestions?

 

[Adina B]

I have the same issue even if i made the right settings, i am so dissapointed and tired of looking answers on the internet ! Nobody from my carrier know what's the problem