As my credit improves, will my credit card companies lower my interest rates and increase my credit limit?

My credit score is 650 and has been improving since I've been paying a lot more than the minimum recently. I think that I have pretty high interest rates. As my credit improves, will the credit card companies lower my rates or am I stuck with the rates they gave me when I signed up? Also, I know they can just... show more My credit score is 650 and has been improving since I've been paying a lot more than the minimum recently. I think that I have pretty high interest rates. As my credit improves, will the credit card companies lower my rates or am I stuck with the rates they gave me when I signed up? Also, I know they can just choose to increase your credit limit, but do you more often have to ask them to do that, or do they usually do it themselves? Thanks :)
3 answers 3