The most important thing to pay attention to is separate the inside/outside antennas as far apart as possible

The indoor antenna turns on and lights up correctly but will not boost any signal at all!Just for the record: I have a Samsung Galaxy S8

I don't intend to use a high-gain antenna until I move to a rural area next

V-20, It's a nice phone just does not have a good internal antenna, and trying a new phone may not resolve the issue operating with a single cell phone indoors at my location

Both are the proofs that I needed to verify if this antenna was effective, or not

At first we installed both antennas on the same end of the RV and it didn't work at all

The install is easy just mount external antenna and plug it into the unit

Update - Dead T-Mobile registration links still found in setup guides online from several sources

To bad t-Mobile support could not provide it over the phone.