Help Internet connection

[miereyoj]

HI! I badly need some help.
I have a phone SONY XPERIA J to be exact.
I always use 3G to connect in internet.
Suddenly it didn't work right now.
I'm very worried because when i connected to wifi, my internet connection works.
The 3G Logo didn't show as well. I already reset my APN and install again the internet setting of my xperia but nothing happend. The logo didn't show and i can't use my internet. Please help me.!!!

 

[bhero]

When you changed/added the APN did you make it active? Have you talked to the carrier? The settings are very specific no typos allowed. Have you moved?