If I'm not connected to wifi or 3G internet can I still see missed calls or texts through Talkatone app?

My service is suspended so I'm using the talkatone app to make calls & send texts through my wifi at home. I won't be connected to wifi once I leave home, so if I get a call or text while I'm not connected to wifi, will it pop up once I connect back to wifi? I have an iPhone if that matters at all.