I got the Cingular GC-83 data card last year and have been happy. I notice a distinct improvement by using an external mag mount antenna. Reception this year has been solid on the interstates, where we routinely have a constant high speed connection while driving. On May 5th, when we went on a chase to West Texas, we had a reliable and constant connection while on I-20 all of the way from the DFW metroplex to Big Spring. We turned north to Lamesa on Hwy 87 and lost the connection about 10 miles north of I-20, which was a disappointing, but it is quite a rural area. We got the connection back with no problem as we neared I-20 again later that evening.
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