External GSM Antenna
The GSM-connector to be found near one of the screws (see Disassembling Neo 1973 in wiki) is:
MURATA MM8430-2610RB3 SMD RF TEST PORT
For a nice fitting adapter search in Google for MXHS83QE3000
[Digikey link, ($32 for package of 10)] http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=490-4982-ND
[Future Electronics link, ($29 for package of 10)]http://www.componentsuperstore.com/Store/ProductDetails.aspx?ProductIdentifier=MXHS83QE3000MURATA9833294
There is no hole for the antenna in the back of the case but you can make one easily with a soldering iron or a drill.