G-Tel in conjuction with ZBC has launched a competition where you buy some G-Tel phone send in the serial number and stand a chance to win a FunCargo Car.
The G-Tel shops that you can visit to get more info are listed below, since the http://www.gtel.co.zw website has no such news.
Harare go to:
5th Floor, Beverly Court 100 Nelson Mandela Avenue Harare
Bulawayo go to:
Corner Main Street and 10th Avenue (Next to Magnet House)
Hope this helps