In settings I am unable to download updates
Are you on wifi when trying to do this? And is your phone plug into a wall charger?
Also try doing a reset, hold down the home/power button together until you see the apple logo and then release, then wait for the phone to boot back up.
The first thing I would do is go to Settings > iTunes & App Stores and make sure you're signed in with the correct Apple ID and password (at the top).
Also, you cannot download updates unless you're in a WiFi area, and either plugged in or have excellent battery life remaining.
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