T-Mobile introduces VoIP-capable phones

Telecoms network T-Mobile has launched a new service which combines Wi-Fi with its own mobile network in a move that will further sideline traditional landlines.

Two specially-adapted handsets are already available in the US - the Samsung t409 and the Nokia 6089 - and will be able to use the normal T-Mobile network to carry calls, but can switch to public Wi-Fi hotspots or the owner's home network if it is in range.

In this way it will reduce users' phone bills as it will use VoIP when connecting to Wi-Fi.

T-Mobile is also launching the accompanying HotSpot @Home broadband router, developed with partners D-Link and Linsys, which broadcasts a wireless signal that can be used by the new phones to switch over to VoIP when in range.

Review site Slashphone says: " What distinguishes the HotSpot @Home service is the network handover; calls originated while in a HotSpot will, once you've stepped out of range, seemlessly switch to T-Mobile GSM cellular, and - even more impressive - vice-versa.

"That means signal issues and patchy reception when at home should no longer be a problem: as long as you're in Wi-Fi range your domestic calls are not only free but carried over the broadband network."