I normally get 3 bars inside my home and sometimes less. Outdoors, near the mall I get all the bars.
I knew the Antenna Specialist(AS) antenna would work. The brand seems to be the most popular. I've been able to achieve 4 steady bars indoors. Just make sure you set the magnet on a metal surface. I have a 12"x12" sheet metal I cut out of my case and used that as the ground. Read the website. They explain it in detail. Very good.
The adapter that I bought(from same place) connects to the back of the phone, where the rubber plug can be removed. The funny thing is, Motorola told me that the V60t doesn't accept after-market antennas, but why have this plug on the back if it doesn't.
The only thing I hate about the adapter is that it doesn't secure well on the back of the phone. Basically, for the antenna to work, the prong on the adapter must touch the small metal part on the back of the phone. To better illustrate this, imagine your left and right index fingers and touch them end to end. Well, that's basically how the antenna contacts the phone's internal circuit. All it takes is a nodge a fraction of a millimeter and the connection is severed and you wouldn't be able to tell unless you constantly look at your phone and see the bars drop. The adaptor is held only by the tightness of the hole, which will eventually loosen as you insert and take out the adaptor over time.
You don't have to remove the stubby antenna and the loop that goes over the stubby only keeps the adapter from swinging.
If you search really hard you may find an adapter that connects where the stubby antenna screws in. That would be much more efficient and provide a snug fit. I've seen it on one website but didn't pay attention.
For the more adventurous, you could mod the stubby antenna and the adapter so that the stubby is soldered on to the adapter.
Overall I'm pleased with the antenna. I expected at least to get one bar increase if I didn't I would've returned it. Again, you may not get the same results as I do.