My son's S4 has just stopped working! I have one as well so we swapped batteries, his battery works fine in mine but my fully charged battery doesn't make a difference in his. It doesn't even appear to be charging when plugged in - just looks completely dead. He got his phone virtually the day it was released on the O2 network (mines on Virgin and only a couple of days younger).
Does anyone have any ideas?
TIA
Does anyone have any ideas?
TIA