Internet is running slow on my iphone 4?

I have a iphone 4 on net 10. Usually in the top left hand corner, then i got the option to update my carrier, when i updatedy my carrier it went from home to tfw. Since then my internet has been really slow. Can someone tell me how to speed up my internet or how to change my phone back to where it says home like before

It might just be your interet but try contacting ur carrier