Why is the data connection of my mobile is not turned on?

[AC Question]

I have Samsung s4 I337. but data connection is not turned on. I have tried many time but fail. the default android is kit kat. how can it use internet on my phone by sim.

 

[dpham00]

Re: why the data connection of my mobile is not turned on?

Do you have a data plan? Does data work with the sim in another phone?