Question about Qolsys IQ Panel 4 cellular carriers

In the product description for the IQ Panel 4, it is stated that you recommend Verizon, unless AT&T has better coverage in your area.
Is Verizon superior for alarm purposes? The reason I am asking is because in my condo, both my AT&T and T-Mobile phones have signal strength indications of 2 out of 4 bars.
I don’t have access to a Verizon phone so I don’t know whether Verizon would be better or worse. I live in a heavily populated area (Rockville, MD 20852) so I am sure Verizon coverage is at least adequate).

I am not sure how to proceed at this point. I have no way of testing Verizon vs AT&T signal strength without a Verizon device.

Hello,

We recommend Verizon for its generally wider coverage. I’ve checked our records, and there are multiple customers in the Rockville, MD 20852 area using both Verizon and AT&T successfully with sufficient signal strength for alarm monitoring, mainly Verizon.

To help you make a decision, I would recommend checking the carrier coverage maps for both AT&T and Verizon. If you find that AT&T provides better coverage in your condo, we can certainly accommodate that. Just make a note on the order when checking out with a panel. While we can’t test Verizon’s signal strength for you directly, from what I am seeing the signal should be sufficient for coverage in your area.

AT&T Coverage map linked here.

Verizon Coverage map linked here.