If you are having trouble uninstall iOS 10 on your iPhone, then you may need to take some steps to do so. Here are a few tips to help you uninstall iOS 10 on your iPhone:

  1. Open the Settings app and navigate to the General tab.
  2. Scroll down and select Uninstall Software.
  3. Tap on the Uninstall button and confirm your selection.
  4. The iOS 10 installer will now start, but it may take a few minutes to complete. Once it has finished, your iPhone will be uninstalled in its entirety.