I have 3 SIM cards and I don't want to have 3 phones to manage them.
I just want to know if for example I can keep one of the cards in my phone and keep the two others in my house plugged in one device.
I just have to install an application and I can receive and send messages, calls from this application using the sim cards on my device.
And everything will work using internet.
I want to do that with my Iphone and not an other kind of phone
Something like that should exists but I can't find it.