No doubt you have experienced a dropped call or had your data rate slow to virtually no data access while using your cellular phone or data card in your car. You might be in a rural area, far from the nearest cell site, and distance from the cell site causes a weak signal. Or perhaps you are driving where there are hills between you and the cell site, blocking the signal. If you are in an urban area, buildings can likewise block cell signals, and entering structures such as parking garages are often sure ways to end a phone call. How many times have you warned the person to whom you are talking, “I’ll call you back if I lose...
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