Hi Jr Mack,
From your post I understand that your iPhone is in recovery mode, but you do not have access to a computer. First, to see if the iPhone has been accidentally put in to recovery mode, try to reset the iPhone. If it's still in recovery mode then you will need to get access to a computer with iTunes on it in order to restore the iPhone and get it out of recovery mode.
To reset, press and hold both the Sleep/Wake and Home buttons for at least 10 seconds, until you see the Apple logo.
Restart or reset your iPhone, iPad, or iPod touch - Apple Support
If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support
Take care,
Alex H.