Do BT antcipate any introduction of a "calling over WiFi" app?
EE are introducing a seamless approach in very selected phones running EE firmware only. However I prefer Three's app approach and being able to select which AP is authorised for WiFi calling and works pretty well. Never got on with O2's TuGo!
do you mean like the existing BTsmarttalk?
Probably a deal-breaker for us.
We have BT broadband both at home (Worcestershire) and at our holiday cottage in Cornwall - but no indoor mobile signal (of any flavour) at either place!
A mobile over broadband solution (either an App or femtocell) would allow us to consolidate our comms on a common number/service - but until then looks as though we will need to stick with PAYG and landline 😞
The free Zoiper app is pretty useful. It's a VOIP client that runs in the background on your cellphone. It connects VOIP calls over whatever physical network is available at the time. Whether GPRS, UMTS, HSPA, LTE, or 802.11, including BTWiFi hotspots.
Direct Inward Dialling (DID) telephone numbers for VOIP are also available for free from certain VOIP providers. The Zoiper app is then configured to accept inbound calls to those DID numbers. The Zoiper client can actually handle multiple SIP accounts. Useful if you're abroad, for avoiding roaming charges, and for making low-cost domestic or international calls (i.e. least-cost-routing).
By shopping around for VOIP providers, making calls to geographical numbers in the UK, USA, and many other countries can be virtually free, as well as free to US mobiles. Those calls that are still charged, are generally minimal in cost.
With the maturity of packet-switched VOIP calling -- and the availability of multiple physical networks to carry the underlying connection -- making a voice-call over the traditional cellphone has surely had its day.