 After inviting reporters in mid @-@ April , Samsung launched the Galaxy S III during the Samsung Mobile <unk> 2012 event at Earls Court Exhibition Centre , London , United Kingdom , on 3 May 2012 , instead of unveiling their products earlier in the year during either the World Mobile Congress or Consumer Electronics Show ( CES ) . One explanation for this decision is that Samsung wanted to minimize the time between its launch and availability . The keynote address of the hour @-@ long event was delivered by <unk> De <unk> , Marketing Director of Samsung Belgium . 
