Cell phone signal booster [closed]

I installed a Bamwirz booster for Verizon bands 2/4/5/12/13/17/25/66 for a business. It’s located in the back of the building and it’s a large metal building with several offices.

When I first installed it almost a year ago, I did a signal test on each person’s iPhone using Verizon, and the booster worked great, and it mostly used band 2 with a great signal around the building.

I added a picture of the readout to show that everything looks great and hasn’t changed from when I installed it, no alarms and the signal is great.

The issue is that no one’s phone wants to connect to the booster automatically anymore, the other screenshot is a field test on an iPhone that is only a few feet away from the booster.

Am I missing something? And why did everyone in the building start having a bad signal just a few months after the booster was installed?

phone signal

Booster LCD