Phone Screen won't turn back on after going to sleep
I bought my phone, a ZTE Blade Spark, 4 days ago, and yesterday the screen randomly went dark. I haven't dropped it. There's no damage to it at all and I haven't spilled anything on it. I assumed it was just my phone going to sleep. I tried to wake it up and the buttons at the bottom light up but the screen does not, so I cannot access my phone. If I hold down the power button and make the phone restart, the screen does light up and I can get into my phone and everything else works fine, but as soon as it goes to sleep again I can't get back in. I need to restart my phone anytime I want to use it.