You can turn off VoiceOver, the iPhone accessibility option that reads details on your screen aloud. All you need to do is triple tap the home button, go to settings, or ask Siri to turn it off for you.
Steps
Method 1 of 3: Use the home button

Step 1. Press the home button three times
If you've set up tripleclick on the home button, you can turn VoiceOver off by quickly pressing it three times.
- You can do this even if the screen is locked.
- When you hear “VoiceOver is turned off,” you'll know that VoiceOver has been turned off.
- To activate VoiceOver again, press the Home button three times and you will hear “VoiceOver is on”.
- If you have multiple options assigned to the tripleclic (eg Voice Over, Assistive Touch, etc.), you will need to select the one you want to disable. Simply pressing the home button three times will not automatically turn off Voice Over.

Step 2. Try another method
If you haven't set up an accessibility shortcut, pressing the home button three times won't work. In this case, you will have to try another method.
Method 2 of 3: Use the Settings app

Step 1. Tap the Settings app icon
It's the gray icon with cogwheels on it. You'll find it on your iPhone's home screen. Tap it once to select it and two more times to open it.

Step 2. Go to the General option
Tap it once to select it and two more times to open it. The General option is at the top of the settings page.
If you are using an iPhone with a 4.7 inch screen, first scroll down with three fingers

Step 3. Choose Accessibility
Again, you'll need to tap that option once to select it and two more times to open it. You will find it at the bottom of the screen.
If your iPhone has a 4.7 inch screen, you will first need to scroll down with three fingers

Step 4. Tap VoiceOver
Once this option is selected, double-tap it to open it. VoiceOver is at the top of the Accessibility page.

Step 5. Turn off VoiceOver
Press the switch once to select it and then twice to deactivate it. You will hear the message “VoiceOver is disabled” and the command will be returned to your iPhone.
Method 3 of 3: Use Siri

Step 1. Long press the home button
It's the big rounded button at the bottom of the screen. Long press it to activate Siri.
If you're using an iPhone 6s or later, you won't hear a chime when Siri starts up unless you're using headphones or a Bluetooth device

Step 2. Say “Disable VoiceOver”
Wait a few seconds for Siri to process your request. When Siri says “OK, I've turned off VoiceOver,” that means the feature has been turned off.