have u compared the rate to other 9210i? if it's the same as the others then I don't think there is a way to slow it down. if it's faster than the others then u have to take it back to nokia and get them to check it out. happened to my friend's 6600. Somethin about the contact point being too close or something. Anyway nokia fixed it. The cost all depends on whether yours is still under warranty or not.