Try going into a Home Depot. I don't think I've ever found one where aside from fairly near the front I've had other than 0 or 1 bars, across a variety of phones and carriers and in neighborhoods where the signal outside the store was strong.

The net is telling me this is because of the aisle after aisle of tall metal shelving and the building itself also has a lot of metal in the construction.

It is quite annoying when you are trying to use the Home Depot app to look up something.

At least Home Depot usually provides free WiFi. Until very recently our Costco was a faraday cage with no cell and no WiFi offered.

They finally added WiFi a year ago or so.

I hated having to walk near the doors to send a “was it this” question to the wife.