Wi-fi calls were covered by Spryfly.
Nimbuzz might work,http://handheld.softpedia.com/get/Inter ... 3363.shtml
But TF has historically limited what phone functions apps can access.
For example apps can't get to the filesystem or the camera, so no Qr-code readers.
MilesFrancis wrote:When I go to the online shop, I do not see any apps, only graphics and ringtones.
and download apps onto this phone?
Go to a site other then the TracFone store.
The phone uses Java apps, distributed in JAR fixes (often with a second file that is used to sign them, a JAD file)
2 popular sites are getjar.com and mobilerated.com
Also some web sites distribute their own apps, like Google, Opera, and facebook.