I am using a Sony XA2 and ever since the 4G connectivity was really bad, it connects to 2G directly but doesn’t seem to pick up 4G for most of the time. If it connects it works just as expected but once it loses it it won’t reconnect for no apparant reason.
I tried different devices (also an XA2 plus) and it showed the same effect.
I am on Vodafone in Germany and overall the net is rather bad in my flat, but if I compare it to my wifes X10 or my Xperia X they connect to 4G just fine so I wonder if anybody has any hints for me what I could try?