Apple iPhones can be purchased from Apple and most major cellphone carriers including AT&T, Sprint, Verizon and T-Mobile as well as electronic retailers Best Buy, Wal-Mart, Sam's Club, Target and Staples as of 2014. IPho... More » Technology Mobile

To unlock an iPhone, contact the service provider that you bought the phone from and ask them to unlock it; the phone guides you through the rest process when you insert a new SIM card. Customers have to meet certain req... More » Technology Mobile

The Apple Watch is compatible with the iPhone 5 model and up. This is because the Apple Watch requires supporting devices to run iOS 8 or higher. More » Technology Mobile

Different mobile carriers offer individual data plans that range from 300 MB to 5 GB; some carriers, such as Sprint and T-Mobile, offer unlimited data packages, while carriers such as AT&T and Verizon do not. Certain car... More » Technology Mobile

The four main mobile phone carriers in the United States: T-Mobile, Verizon, AT&T and Sprint, allow customers to activate their phones online. Some plans require an activation charge, but customers generally pay this whe... More »

Some of the top cellphone companies are Verizon, T-Mobile, AT&T and Sprint. These companies all provide reliable coverage, a variety of devices as well as multiple plans and features. They differ in cost, coverage and da... More » Technology Mobile

T-Mobile and Sprint are the major post-paid carriers that offer plans with unlimited data. Neither AT&T nor Verizon offers an unlimited data option for their post-paid customers as of April 2015. More » Technology Mobile