To my understanding your PMI will fall off once your loan balance has reached 78% of of the original purchase price and you have been paying for 5 years(Assuming it is 30 year mortgage). Alternatively, you can refinance to a conventional loan after the "Seasoning" period.
@Steeve Gauthier@Dov Klitnick Ues, you have to refi into conventional. For an fha loan imitated after 2013...10% down or more, MIP is for 11 years. For less than 10% down, MIP is for the life of the loan, period.