after reseting and rooting, i have problem with my tablet. It makes me crazy! i can't download or install any apps as usual. maybe, it is because of google play and i try to download a new one to replace but it seems impossible. Then i found another way. I download apk files to install apps indirectly but when running these files, it is announced that they may harm to system. Now, I am in trouble with them. please help me! my tablet is samsung tab 3. thanks for any suggestion!