My phone has done this a few times without rhyme or reason, I can count the amount of times with 2 hands in the past year, but that is not the worst issue. The worst issue is the incredible battery drain, even when my phone is on power saving mode. Within 3-4 hours, my phone is dead. It seems as if the last software update created a lot of issues for me, including my phone's rejection of car chargers. I have a charger at home and in my office, and I don't mind having to constantly be plugging in, it's being on a road trip and being unable to plug in my phone that is a big issue. My temporary solution was buying a spare battery, but this is tedious at best, and having to open and close the cover multiple times a day has caused some cracking of the plastic.
By the way, I tested the car chargers with my sister's boyfriend's S4 and they worked, so I know it's my phone. Also, the charge meter will sometimes reach 99% after 4 hours of charging, other times, only 89% after being on the charger for 12 hours. It makes no sense. Once I take it off the charger, 5 minutes later it will say 97% (huh??) and 2 hours later, 51%. This happens with both the old and new battery! This is my second S3, as the other one's home key would not work and I had to file a claim with Asurion. I am very disappointed with the Galaxy phones. My HTC G1 lasted me 5 years without replacement, these have barely lasted a year without having problems. I am going to do a factory restore but if that does not work, I will be switching to another non-Samsung Android device.
