I ordered another NMO through roof antenna. They get a good connection to the metal roof. The old one worked quite well.

The phone cradle does work well.

I got the through roof antenna installed. It is a Wilson antenna #311104, with cable and mount #905814. Also needed a cable end adapter #970019 (SMB plug to SMA female) There is a better signal than before. 1-2 bars up to 3-4 now.

The magnetic mount antenna that came with the booster worked well on the steel car roof but not as well on the coach. The through roof mount has a good connection with the inside of the metal roof and works better.

This booster was less expensive than many of the others available and I am happy with the results. It is effective with both my cell phone and wi-fi hotspot.

Thanks for the update . We plan to upgrade ours to that one in the future .