(I hope I haven't posted about this subject. I could not find it. If I have, the mods are welcome to delete whichever is the duplicate.) As most know, I've been ending up in ER and subsequently hospitalized more often. (4x in 2016) Each time, my ATT phone don't work there. Staff indicates only Verizon works. After research, I decided to get a Verizon Hotspot. With it, I can use wifi calling on my Samsung S7-Edge as well as surf the net. (Even if I don't get hospitalized, a visit to ER is usually a minimum of 10 hours.) I thought I was going to end up hospitalized a couple days ago due to internal bleeding. But the bleeding stopped and the 2 phone consults I had with doctors indicated that at present all they needed was a blood and urine test. So I have yet to actually test the device inside the hospital. (It takes about 40 minutes to get there so I'm in no hurry to go there just to test it out.) Verizon charges $20 for one gig of data and it lasts one month. And can reload it right from the app on my phone. Good solution for temporary needs.