The transfer of data from iPhone to iPhone

Make an iCloud backup

1. Connect your previous device to the Internet with Wi-Fi.
2. Go to Settings > [your name] > iCloud > iCloud Backup. If you’re using iOS 10.2 or earlier, go to Settings > iCloud > Backup.
3. Make sure that iCloud Backup is turned on.
4. Tap Back Up Now.
5. Stay connected to Wi-Fi until the process finishes.

Transfer your SIM card or contact your carrier

If your new device needs a SIM card, here’s what you need to do:

• If your carrier gave you a new SIM card, put it in your new device.
• If your new device uses the same kind of SIM card as your previous device, transfer the SIM card to your new device.
• If your new device needs a different kind of SIM card than what you have, or if you aren’t sure, contact your carrier.

Then use the steps below to transfer your iCloud backup to your new device.

Transfer your iCloud backup to your new device

1. Turn on your new device. A “Hello” screen should appear. If you’ve already set up your new device, you need to erase it before you can use these steps.*
2. Press the Home button when you see the “Hello” screen. Follow steps until you see the Wi-Fi screen.
3. Tap a Wi-Fi network to join. Follow steps until you see the Apps & Data screen, then tap Restore from iCloud Backup > Next.
4. Sign in to iCloud with your Apple ID and password.
5. When asked, choose a backup. Make sure it’s the correct one by checking the date and size of each. If asked to update to a newer version of iOS, learn what to do.
6. If you purchased iTunes or App Store content using multiple Apple IDs, you’ll be asked to sign in to each. If you can’t remember the passwords, you can skip this step by tapping “Don’t have an Apple ID or forgot it.”
7. Stay connected and wait for the restore process to finish, then complete the rest of the onscreen setup steps. If possible, keep your device connected to Wi-Fi and plugged into power after setup. This allows content like your photos, music, and apps stored in iCloud to automatically download back to your device.\

Transfer your iTunes backup to your new device

1. Turn on your new device. A “Hello” screen should appear. If you already set up your new device, you need to erase it before you can use these steps.*
2. Press the Home button when you see the “Hello” screen and follow steps until you see the Apps & Data screen, then tap Restore from iTunes Backup > next.
3. Connect your new device to the computer that you used to back up your previous device.
4. Open iTunes on your computer and select your device.
5. Select Restore Backup. Then choose a backup. Make sure it’s the correct one by looking at the date and size of each. If asked to update to a newer version of iOS, learn what to do.
6. If you need to restore from an encrypted backup, enter your password when asked.
7. Wait for the restore process to finish, then complete the rest of the setup steps on your iOS device. If possible, keep your device connected to Wi-Fi and plugged into power after setup. This allows content like your photos, music, and apps stored in iCloud to automatically download back to your device.

for more detailed steps with picture click the link below

https://support.apple.com/en-us/HT201269