EU-JY-UO135N4G 4G Antenna Quality

[PeteHalsted]

Finally got past the SIM not recognized issue. But now I am disappointed with the quality of the antenna. We are using Google FI, which is using TMobile where we are at. Both our Pixel and Pixel 3 have full bar 4G LTE sitting in the car. The radio, with the external antenna ran up and attached to the top of inside of the windshield. Hovers between 1 bar of 4G and 3G.

Is there a better 4G Antenna I can use, is there a recommended installation orientation or location?

Thanks.