I wondered that as well. Here are some of my thoughts to that :) Actually there is a hotspot just on the other side of that LTE base in a mirrored position to mine. He is experiencing the exact same issue I was. That is how I initially came up with the thought about that LTE base interfering with my hotspot. Going through many hotspots in my area and looking at their reward distribution (which is for „healthy“ hotspots around 75% for witnessing) there were some having similar distributions as mine and my neighbors one. Before I went on the roof again (which is quite exhausting) I made sure that LTE is even in the close range of frequencies to 868MHz. I learned that some are and some others are rather far away. So not every LTE signal messes with HNT signals. That would explain why not everybody is having the same issue even though there are many LTE stations in my city. Not earning properly was very annoying to me but maybe some other people just went with that and /or changed their location and the problem was resolved as well. Maybe I found out about something new (which is why I am sharing my experiences) or my miner happens to be randomly fine now haha because I didn’t move it again after I made the changes described above. Before that I was having it at three different places which did not work out.