I went to Knoxville, TN for Thanksgiving today and brought my 4s with me and it's getting 2 bars average. Is it supposed to still get service? Before when I made calls it would fail, but now it calls American Roaming. It's a Verizon phone with an old SIM card, but it still gets a few bars when I take the SIM card out. Anyone know why? Verizon's 3g networks shut down a while ago.
Pretty much every phone after 2009/2010 uses the same digital protocol. So yes, it should get call service until the standard changes again. It kind of has half way through 4G. High definition calls on iPhone use data. But they still rely on digital phone for the most part.