Definitely check to see if Fannie or Freddie own your current mortgage. Call your current servicer and ask, then request a DU or Fannie Refi Plus or a Freddie Mac Relief. I underwrite for a large bank, these are definitely the way to go when your house has decreased in value. Your loan to value can be as high as 125% on your first mortgage and if you do not have mortgage insurance currently, you will not need it on your new loan.