Sam:
Pull down the center piece of trim underneath the hole (in the interior of the truck) and see if you can find the 3 leads that the antenna plugs in to, like Myarmar posted a picture of.
My concern is that a GSM phone uses a different type of antenna than what is used here. If I am not mistaken, a GSM phone is not a cell phone, I am assuming a GSM phone is a satellite phone, and if so the antenna may be different. The GPS part of the antenna would be the same. Possibly the GPS antenna would work as the antenna for a GSM phone.
Is there no dealer or GSM phone/GPS specialty shop in Hong Kong that can help you with this?
Gilly
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