Cell Service at Worlds

[zakattacks]

I was wondering what cell service is like at worlds (all divisions, etc.). An optional component to our scouting system requires a cell signal, and we need to renew or buy a new sim card for it. At Inland Empire, we barely had any service and we were glad it worked, but we are worried that won't be the case is St. Louis.

The question is, what is the best carrier for use at worlds? Right now we have tmobile some devices (prepaid plan, so switching isn't much of a concern) and verizon (contract) on the others.

This is 3250's first year going, so we have no idea what to expect. Any advice is appreciated.

Thanks!
-Zak