Help Data will not connect

[Optimus l70 Data Problem]

I just got a LG Optimus l70 and was going to go to youtube for some music but it said it was not connecting to the server. The Play store and google chrome say this as well. The wifi works perfectly fine with connecting to the apps but when it is just on the data its self the apps will not connect. I have only had this phone for about a week now and love it but I have tried everything to get the data to connect with the apps again. Any thoughts? Thanks.

 

[ChibiWolf]

Go to settings>tethering and networks>mobile networks>apn> go to the top selection and set it

 

[ChibiWolf]

He said the other apps won't connect on data either and I had this problem. When I changed it, everything started working