The Apple ID includes your Apple email address and password. This identifier is required in order to receive services simultaneously from several devices (phone, tablet and computer). You must enter your Apple ID password to use the new Apple service or buy an app from the App Store. You can change your Apple ID password directly on your iPhone; You can also reset your Apple ID password if you've forgotten it. Keep in mind that changing your Apple ID password is different from changing your phone password.
Steps
Method 1 of 2: How to Change Apple ID Password
Step 1. Open the iPhone Settings app
Tap the gray gears icon on the home screen.
Step 2. Scroll down, find the “iTunes & App Store” option and tap it
It's in the "iCloud" section.
Step 3. Click "Apple ID" at the top of the screen
Step 4. Tap the "View Apple ID" option
The system will ask you for your Apple ID password.
Step 5. Enter your Apple ID password
Enter the password you use to log into Apple services such as iTunes and the App Store.
Step 6. Click "Apple ID" at the top of the screen
The Apple ID account page will open.
Step 7. Log in with your Apple ID email address and password
Enter the address and password you use to log in to services such as iTunes and the App Store.
Step 8. Press "Go" on your keyboard to go to your account
Step 9. Go to the "Security" tab
A menu with security questions will open.
Step 10. Enter the answers to your security questions on the appropriate lines
This will give you access to the Security tab where you can change your password.
Step 11. Click Change Password
Step 12. Enter your current password and then enter a new password
Do this on the appropriate lines. The new password must be entered twice.
Step 13. Tap Change Password
The password will be changed.
Step 14. Update your Apple ID credentials on all devices and services you use
This includes phones, tablets, computers, iTunes, and the App Store.
Method 2 of 2: How to Reset Apple ID Password
Step 1. Go to your Apple ID account page
Use this method if you forgot your password - you need to reset it on the Apple ID website.
Step 2. Click on Forgot Apple ID or Password?
»Under the lines for entering credentials.
Step 3. Enter your Apple ID in the appropriate line
Enter the email address you use to sign in to the Apple ID page and for new Apple services.
Step 4. Select the "Receive message by e-mail" option
Apple will send you an email with a link to reset your password.
You can also answer the security questions you chose when you created your Apple ID
Step 5. Click "Continue"
An email will be sent to your email address with a link to reset your password.
Step 6. Open your mailbox
Step 7. Find and open the letter from Apple
The subject line of the email will be “How to reset your Apple ID password”.
If you haven't received an email within a few minutes, look in your Spam folder (and your Gmail Updates folder). Filters of some mail services are triggered by letters from Apple
Step 8. Click on the "Reset Now" link that you will find in the email
You will be taken to the Apple account password reset page; on this page you can enter a new password.
Step 9. Enter the new password twice
Do this to make sure the passwords match.
Step 10. Click on "Reset Password"
The password will be changed.
Step 11. Update your Apple ID credentials on all devices and services you use
This includes phones, tablets, computers, iTunes, and the App Store.