Yes, most commercial SIP providers are required by law to support emergency services, at least in the US.
If we're getting technical it is a mobile phone, just not a cellular phone. A cellular phone will work anywhere it can get a compatible cellular signal and this will work anywhere with decent WiFi.
If we're getting technical it is a mobile phone, just not a cellular phone. A cellular phone will work anywhere it can get a compatible cellular signal and this will work anywhere with decent WiFi.