Samsung Galaxy S 4G wifi calling
After a tremendously high cell phone bill which Tmobile refused to deal with in any meaningful way with me, I have canceled them. I relied heavily on wifi calling when out of the country. A Tmobile rep told me if I upgraded to the newest firmware and a new sim card I would get better wifi reception. I upgraded and my wifi calling went down completely. I then had to go out of country and use my phone and got billed for every second I was on.....if I hadn't believed the Tmobile rep and not upgraded I would have been fine. The phone has bugs in its wifi capabilities. I have unlocked the phone andam now looking for a good wifi calling phone as this one is not....