BASE, one of Belgium's major mobile operators launched their new BASECHECK package to promote their new mobile internet plans.

For their below the line communication Gemango was hired to develop a Facebook application where users were encouraged to form groups with their friends in the Facebook application to check into real stores in major cities boosting the awareness, reach, conversation and fans of facebook.com/basecheck.

By motivating participants to convince their friends to use the app as well since they needed others to join to win a price, the reach of the app exploded.