Been so so for me. I've always had ATT and personally only had bad reception in my home. Almost anywhere else I had 4g LTE everywhere. Never saw Edge connection, worst was 3G.
I just switched to Verizon for this device when it came out so first time with Verizon. I get better 4g LTE connection at home but I've noticed in stores I get only 1x (is this Edge type of network compared to AT&T?) Or maybe 1-2 bars of 3G. Only get 4G LTE when outdoors. Even inside huge Target, Wal-Mart, whatever get cfao reception when on AT&T this was never an issue. This might be a carrier thing though, nothing to do with this device but again nothing to compare to, first device and time on Verizon network. Surprising too living in southern California where LTE is literally everywhere here. Actually had much higher hopes for Verizon network, feeling let done here.
Device: Verizon HTC One (M8)
Current Rom: Stock
Location: Southern Cali