A little over 2 years ago, almost 3, the ATT cell tower about a mile from my humble domain went offline while the techs installed 5G antennas. It took them about 3 days to complete the installation.
Last August the techs were up there again changing the antennas. Curious I took my golf cart to the fenced in area around the tower. There was a tech inside moving things around and I asked him what was going on. He said we're changing the antennas. I said that someone just put 5G antennas up recently. Did they go bad? I asked. No, he said, we took the 5G antennas down and installed 4G enhanced antennas. Couldn't get much out of him after that.
We live, however, on one of the approaches to Atlanta Hartsfield airport, about 120 miles away. I think that was the reason for the change.
Our phone service did improve, though.
One more thing, seeing the antennas laying on the ground, or their covers, those things are 15 to 20 feet long and about 18 inches wide. I wish I could have looked inside one.