My wife needs a second phone number for minimal use at her hotel, she's the GM. Not really wanting to carry two phones and I found Line2. Does anyone use this and have a serious opinion about it? The reviews are shaky looking to me. Are you able to receive calls on the second line without having the app open? And when you make an outgoing call on the second line, what phone number shows up to the caller? And how does voicemail work on it?