at&t

Verizon Wireless confirmed today that its LTE phones will not “be compatible on other LTE networks in the U.S.” because “the phones will be on different frequencies,” according to Verizon spokeswoman Brenda Raney.

The new 4G LTE system used by Verizon, MetroPCS, and soon AT&T runs on SIM cards much like the ones for GSM networks, and GSM phone owners are used to being able to switch phones from network to network, as long as they’re unlocked.

But Verizon may be designing its phones to only run on Verizon’s very specific wireless frequency, locking out all other possible carriers. Verizon and AT&T both run their LTE networks in the 700-MHz band. But Verizon’s network is mostly in 746-787MHz, while AT&T’s will be primarily in 704-746MHz. Some Verizon and AT&T spectrum overlaps in an area called the “lower B block,” but not much. Verizon could build its phones to exclude AT&T’s frequencies, and vice versa.

via Verizon LTE Phones Probably Incompatible With AT&T | News & Opinion | PCMag.com.