So I have done everything listed here to no avail. Then I took it to the Sprint store for repair. They set it on a wireless fast charger and it worked, so they decided that it had to be the charging port They replaced the charging port, the battery, the screen, and the back of the phone. None of that fixed it, the only thing I got was a new battery and a phone without a screen protector because they broke the screen and threw away the protector that was on it. Repair guy said he was pretty sure none of that would work, intimating that it was a glitch with the update.
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