He admits it was a shock but now he has joined City he feels the move has turned out even better for him.
"Football is football and you never know what will happen, but it was a shock when QPR told me I was leaving," said Simpson to the Leicester Mercury.
However, he is yet to feature at the King Power Stadium.
"I pretty much played every game last year and I was expecting to start this season, but it has worked out better for me because it is a club going in the right direction from top to bottom.
"They are a great set of lads here and I wanted to be in a team that is progressing and wants to do well in the Premier League.
"I think we have shown that already."
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