How do you reset an iPhone 6?

Reset iPhone. Hold down the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. You can reset the word dictionary, network settings, home screen layout, and location warnings. You can also erase all of your content and settings.Sep 20, 2016 read more

If you forgot your passcode, get help. Select your iPhone, iPad, or iPod when it appears in iTunes. For an unresponsive device or one that won't turn on, learn what to do. Or get help if your device doesn't appear in iTunes. In the Summary panel, click Restore [device]. Click Restore again to confirm. read more

A master reset restores the original factory settings and may delete your personal data on the internal storage, such as downloads, ringtones, images, apps, contacts, and Visual Voicemail. It does not delete data stored on the SIM card or SD card. read more