Another cellphone carrier would require literally taking your phone apart and inserting a SIM card of some sort, which would not be easy at all.
contact your cellphone carrier
virgin mobile
Nope you need a carrier
depends on the carrier and plan
You will need to contact your cellphone carrier to find out about plans for it.
All cellphones have text messaging unless your cellphone is one of the first cellphones ever invented. Go to your cellphone carrier and talk to them about how to acess your text messaging.
Not anymore than ks to SIM Cards and the 4S's dual-antenna ability.
You call your cell phone carrier and tell them you want to change your number.
In the continental US AT&T has sole exclusivity as the carrier for iPhone through 2011.
Safelink Wireless is a cellphone company for people who qualify. The government does pay for it if you qualify. Unfortunately, Safelink is the only carrier in the United States like this.
You cannot track someone unless both parties have the correct phone, carrier, and service.
That depends on your wireless carrier (cellphone company) or your local telephone company (for a landline phone).