He reports a solid 4 bars inside his cabin along with fast 4G data service, and this with the included mini antenna temporarily sitting on top of the boat's arch

it did not boost the 3G signal at my physical location, my phone goes in and out of 1X to 3G, I had hoped it would stabilize the 3G for voice and text, but it did not do anything that could be seen.

But for the 3G phone this works great.

He reports a solid 4 bars inside his cabin along with fast 4G data service, and this with the included mini antenna temporarily sitting on top of the boat's arch

it did not boost the 3G signal at my physical location, my phone goes in and out of 1X to 3G, I had hoped it would stabilize the 3G for voice and text, but it did not do anything that could be seen.

But for the 3G phone this works great.