Nextel Communications

Pros: Strong data plans and other features for business users; offers plans with free incoming calls; pioneered Push To Talk walkie-talkie service.

Cons: Casual consumers may find the rate plans limited and expensive; no prepay plans; no off-network roaming; at present, no Bluetooth phones.

Where can I use this service? All 50 states; more than 90 countries worldwide.

What should I know about this carrier? All Nextel phones feature a Push To Talk button to access the nationwide Direct Connect service.