My 3G won't work on iPhone 4s ios7?

My phone will not connect to 3G. It comes up with 3G at the top left of my phone but I can't connect to the internet at all. I have tried resetting my network settings but nothing works, I with vodoafone. I really need to sort this out, would changing my sim or changing my mobile network to EE or something help?
If anyone knows please help because I really need to fix it, thanks

What does Clean ESN, ready for activation on swappa or ebay mean?

I'm about to buy an iPhone that's new and also listed as Clean ESN, ready for activation. I know that means i can activate it with the carrier its locked to which is AT&T but can i use online unlocking service like iunlockpro or any another one to unlock it so that i can use it with any GSM? Or is this only for the carrier its locked to since it new?
thanks.

Added (1). the carrier is Sprint not AT&T

I tried to update my iPhone 5 and now its in recovery mode?

So i tried to update my iPhone 5 from the old version to the IOS 7 and for awhile it was updating and now on iTunes it says it has an error and can't update the phone so i unplugged my phone and it right away said to plug it back into iTunes and once i did it says iTunes has detected an iPhone in recovery mode and now says i have to restore my phone to use on iTunes and i haven't backed up my phone in awhile and i'm afraid once i do i will lose a lot of important stuff and i don't know what to do because my phone just won't work, tried turning it off and the screen goes black then says to plug into iTunes…

Smoke coming from iPhone headphone jack?

I dropped my phone in water and put it in rice. When I took it out everything was working except i had a piece of rice stuck in the jack. I tried to use a needle to get it out but i went too far and the jack started smoking and my phone won't turn on at all now. Is there anything I can do? Can i get it fixed or will it have to be replaced?

How to transfer music from iPhone to iTunes on a new computer?

I got a new computer and want to transfer my music onto iTunes but the music isn't exactly "purchased" so I can't sync it by signing in with my iTunes account. Is there anyway that I could do this? I also want to avoid using a downloadable program if possible.

Would the iphone 4s 8gb be good on virgin mobile?

I'm thinking about getting the 4s on virgin but i'm wondering if battery life is good, and is browsing good considering its 3g. I live in Dallas Tx so I don't know how good service would be. All I need is fast or at least descent web connectivity and enough memory for my apps and music.