I know there's plenty of wifi-calling apps out there but am a bit unsure if any of them do this particular thing I need it to. There's poor cell phone reception in my office but strong wifi signal. I'm wondering if there's an app that allows phone calls or texts to a mobile number to go through to a phone without signal, but connected to wifi. No app-to-app stuff, only receiving calls/texts when contacted via cell phone number. Any help is appreciated!