if you are at open contract, you could swithch, if you are in close, but the the term is up, thee is no any penalty, but if not, varable rate only for 3 months interest, and fixed rate will be the differential depans which one is greater. but switch is no lawer fee only refinancing will have lawer fee and apprisal fee, some bank said they willpay for you, actually you still pay sth else. don't forget bank only care money, if they give sth must be take away from you from sth else. they won,t lose!!