I have a first gen iPhone and lately the vibrate has been going in and out on it. For example, it will be just as good as a new iPhone but 2 minutes later the vibrate may be completely dull and useless. Would this be replaceable under applecare? I bought the phone/applecare in February. To add to the problem, the back has some normal wear and tear on it but I dropped it once in April and the corner just got scratched up. Will Apple say the drop damaged the vibrate? Thanks.