Why is my phone taking so long to charge? The answer is easy: Try only charging your phone while it is off. This works best for me with my Kyocera Hydro Icon (not Samsung, but a smartphone none-the-less). I make sure all my apps are shut down, WiFi and Bluetooth are shut down, then turn my phone off to charge. This makes a world of difference. Also, if you are in an area that your phone is constantly “searching for service” put the phone in airplane mode. My phone’s battery dies way more quickly when it is constantly searching for service. If this doesn’t work, you may just have to break down and contact Samsung.