I got one of these today, replacing an old iPhone, and I have some questions 
The first one, is relating to sending text messages. On my old iPhone, if I didn't have mobile reception (and I rarely do where I live) then the texts went via WIFI as an iMessage - is it possible to do that with the S5, and if so how? Without using an app I mean, I have WhatsApp but not all my friends use it.
That will do for starters

The first one, is relating to sending text messages. On my old iPhone, if I didn't have mobile reception (and I rarely do where I live) then the texts went via WIFI as an iMessage - is it possible to do that with the S5, and if so how? Without using an app I mean, I have WhatsApp but not all my friends use it.
That will do for starters