Verizon: No 3G Handoff for 4G Calls

Verizon Wireless does not plan to let voice calls placed over its LTE network roam on to its CDMA network when it introduces voice over LTE (VoLTE) smartphones next year. "VoLTE will not hand down to 1X," Verizon Wireless product development executive Marjorie Hsu said. 1X is Verizon's 3G network air interface.

That limitation will be a negative for some potential LTE users, at least up to about 2013, when Verizon expects to have its LTE footprint identical in coverage to its current 3G footprint by then.

But the decision does point out the issues of making a transition from one air interface to another. Verizon could handle the handoffs, but only at the cost of increased complexity.

Verizon: No 3G Handoff for VoLTE Calls | Wireless Week