Locked phones: Most major service providers such as Alltell, AT&T Wireless/Cingular, Sprint/Nextel, T-Mobile, Sprint PCS, U.S. Cellular, and Verizon carry their own versions of popular cell phone models. For the most part, these phones are locked by the service and can only be used on their networks. Since most nationwide services have millions of subscribers, buyers who already hold service contracts search eBay for phones compatible with their providers.

Unlocked phones: Unlocked cell phones and PDAs are phones which are not restricted to one wireless carrier. They are usually activated by inserting a Subscriber Identity Module (SIM) card issued by carrier. Buyers who plan on using their phone for a longer time look for unlocked cell phones so they are not restricted to one carrier. Some unlocked cell phones can also be used internationally by inserting an international SIM card, making unlocked phones very popular with travelers and international buyers.




Should I Buy A Phone On Ebay