My Samsung Galaxy S4 was on 4g and now its on 3g, how do I change it back?

[sherylo]

My samsung galaxy s4 was on 4g now on 3g

my samsun gaxaly s4 was on 4g and now it says 3g, what happened and can i change it back?

 

[B. Diddy]

Re: My samsung galaxy s4 was on 4g now on 3g

Welcome to Android Central! This occurs in areas where you know you should have a strong 4G signal? I'd speak with the carrier.