Carol we have Sprint phones and also Sprint data card with a Linksys router. We have had too weak a signal one time on the air card. Has worked very well every where we have been.
We just left a rally south of Colorado Springs in the mountains and we had the only phones that worked there! Our phones didn't work well when the clouds came in for a storm but worked very well most of the time. People were surprised when they found we had a phone that worked there.
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