I had my phone replaced after a year so the phone is new but the battery is old. Recently it would shut off (even if it had battery life) and not turn on until I took the battery out and put it back in a couple of times. Yesterday a grey battery icon appeared and when I plugged the phone in the led blinked orange and green. This morning the phone would not turn on at all even after fiddling with the battery. Is this a phone problem or will replacing the battery work?