Ann: Norwood Moves into Next Phase of World Phone Growth, page-54

Tested out APP to APP calling this morning. I couldn't ascertain whether the call was being made via WiFi and whether it was free or not; this was whilst connected to 4G (Mobile Data Enabled)

So I ended disabling mobile data on both phones as to force the Worldphone app to use Free calling (app-to-app). We then made a call via WiFi. The call quality was great, and it functioned as expected. I also used the 2 free minutes on his phone to make a quick call to another colleague's mobile number in the UK. Call quality also exceeded expectations in this test.

I think they need to improve the interface to make it clear when calling via cellular or voip, and whether the call will be charged using minutes. This would make it clearer to a user whether the call will be made at no cost or if it will consume minutes/credits.

Will do some more testing over the Easter break and report back.