Help Phone via wifi

[Phone via wifi]

I'm wondering is there a way to use my carrier number for making calls and sms via wifi. But I also want it to work via GMS if I don't have wifi at this moment.
The problem is that I don't have much signal at home and school but I don't want to use a second number for doing my calls via wifi.

 

[Crashdamage]

There's no app I'm aware of that can do what you want. However, if your service provider offers WFi calling like T-Mobile it works exactly like you want.

 

[psionandy]

You probably want to check with your network to see if they have a way of doing in.

I'm on the Three network in the UK and use their 'Three in touch' app which allows me to register my phone on my WiFi network for calls and sms. I Know other networks here have similar apps.

Alternatively some others offer a little femtocell box that you plug into your router which they use to plug gaps in network coverage.