AT&T, because it's the only service provider for a GoPhone, which is a registered trademark of AT&T.
When your cell phone is unlocked, you can use it with any service provider's network. The original service provider will have to unlock the cell phone for you.
The cheapest plan by far is to go with a prepaid phone. You can choose what payment is right for you. Such providers are Go from AT&T and T-mobile to go.
When looking to get a new cell phone, you will find that you will have plenty of service providers to choose from. As you are choosing a new phone service provider to go with, you should select one that has a reputation for good customer service. A phone service provider should be able to work with you in events of phone malfunction or improper billing. If you read consumer reviews that state otherwise, you should choose a different provider.
On The Go WIRELESS has an inexpensive service. contact them at 145 Civic Center Dr., Augusta, ME‎ - (207) 622-3801‎ Though verizon also has a good pay as you go plan.
You will have to go to the service provider and ask them to activate the phone. They will usually charge a fee , about $20, to activate a phone you did not buy directly from them.
AT&T. They have the cheapest prices and the best bundles with cable and cell phone. The cable companies usually have the cheapest rate, so go to your local cable provider: Time Warner, Charter, Cox, etc."
The cheapest plan will depend on the provider you choose for the features you want. If you need something for an emergency get a pay as you go. It will cost you $10-$15 a month to top it up.
Checking companies online in your area and comparing prices is the best way to go.
It depends on your service provider.
go to local phone provider store and ask for a built in 3G network
Check the local phone book. If you do not have one, go to the library. You can always check online with one of the many search engines. Search line should read "Local phone service provider for (your city or county). There are several phone companie in every city. A phonebook or the internet can be a good place to find a local phone service provider.
just go to your local phone shop, if its a cell/mobile, they can unlock it with their computer, for i a fee usually, but its not that much.