I actually ended up doing a factory restore, and it was fine after that.
Also, I installed AirPush Detector - it tells you which apps have ads (thus I removed those)
Originally Posted by E22WWU
My phone completely stopped charging altogether after about 3 weeks of use. I'd leave it on the charger over night and it wouldn't charge over 45%. Later it wouldn't charge pass 4%. Sent the phone (along with the factory charger, & battery) back to Samsung to get fixed, they replaced some component, and got it back yesterday and still having the same problem.
I'm in the process of doing a warranty exchange through T-Mobile, but I fear the newer phone will have the same problem..