I was experiencing the same thing as you guys, I disabled S Voice and nothing. I disabled the magazine and nothing, besides having problem with getting lots of Edge signals so I called Samsung and Tmobile and they were not aware of the problem. Tmobile told me that if I wanted to exchange it I could do so since I was still withing the 30 days try out. So I went to the store and told the rep there and of course he told me that I had to many apps that were unnecessary and that probably the reason and to turn this off and this other off and so on. I told him what is the reason to buy a Merzedes if I have to get rid of the radio and put different set of tires ? same here with this phone. We went back and forth until I told him that I was not there to deal and wheel and to read the notes from Tmobile headquarters and to give me a new phone, at the end he did. But this is what I discovered, the new screen responded instantly to the touch of either home or power button until I inserted the SD Card (Samsung brand). It started all over again with the difference that it is a bit faster than the previous phone. I googled this problem and I found from other people that the memory card is supposed to be the cause of the problem and that this happened also with the Note 2. I guess I could put up with the lag on the wake up part of it but one that it hassle is when I have been on the phone for a while and I move the phone away from my ear, I have to wait for about 3 or 4 seconds for the screen to become live in order to hang up. So far the only thing I was able to fix completely was the connectivity part, 4G/LTE stays up 99 % of the time.
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