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shortbus -> RE: Onboard Cell Phone?? (12/7/2005 3:06:11 PM)
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if the onstar is satellite, it's not going to be cheap, and there are only a few satellite carriers out there. if it's dual mode, you'll need to find out what technology it uses to determine which carrier to go with. Verizon and Sprint are typically CDMA everywhere, Cingular and T-Mobile are GSM/TDMA (Cingular and Verizon, in most markets, still have to offer analog service until August 7, 2007, but availability is limited). Nextel is on their own, but now that they're owned by Sprint, you may be able to keep your plan if the onstar is CDMA. otherwise just get an external antenna/car kit for your personal phone and put the antenna on the roof. the ground plane from the steel roof will definitely improve your signal quality.
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