Locked cell phones mean that you can only use the device with a
single or very limited number of service providers, such as
AT&T, Verizon or T-Mobile. An unlocked cell phone provides the
opportunity for bargain shopping for the service provider offering
the best monthly service plans. You won't find cheap or unlocked
phones through a service provider. Instead, you can use online
marketplaces like Amazon.com or Ebay.com to find resellers who do
offer unlocked devices.