I noticed recently my iphone 5 has been acting weird lately......I first noticed it a few weeks ago the usual bink sound the phone makes when the lighting charging cable is plugged in the charging port, it's now vibrating instead of the normal bink sound. The lock sound on the slider and the keyboard clicks no longer work when the option is turned on and I notice the keypad tone isn't working either when I dial a phone number. Any suggestions I'm stumped ? Would a restore from itune backup fix the problem ? I have applecare plus coverage think apple would replace the phone ?.