I have an iPhone 7 plus and continuously drop calls. I have noticed that my iPhone will display 3-4 bars of LTE, however data connectivity is little to non-existent; for example websites fail to connect or can up to a minute to load and Several apps fail to respond. When using snap chat, snaps consistently fail and have to be sent several times before they successfully send. I’ve tried to conduct speed tests when this happens and they also fail. I’ve also noticed that in several areas where I previously had a strong LTE signal, I know see the phone toggle from LTE to 3G. Also, it seems my data usage has increased, which doesn't make sense, as LTE connectivity is rarely accessible.
I’ve rebooted the phone, conducted a soft and hard reset and nothing seems to remedy the issue. Any idea on how to fix this irritating issue?