So I've had the Galaxy s4 for a little over 3 months and everything was working perfectly until yesterday where I plugged it into the charger and turned it off last night when I went to bed, then when I woke up the phone hadn't charged and the charger wasn't working at all (no vibrations or indication that it was plugged in) however when I plugged in an blackberry charger, the phone charged but at a lower rate. What is the problem? and how do I fix it? any help is appreciated.