1) Go to the "Settings app" >> Applications >> Then "Tap" Unknown sources >> Now your phone download apps from the internet, other app markets...
2) Try these App markets once you've done step 1: Apptoide, BlackMart Alpha , Snappz Market.
Can you answer mine please: http://uk.answers.yahoo.com/question/index?qid=20130428071951AAgYr70 Thanks