Charge both phones and connect them to Wi-Fi
Update Samsung and iPhone to the latest software
On iPhone, start setup until you reach the Apps & Data screen
On iPhone, tap Move Data from Android
On Samsung, install Move to iOS from the Google Play Store
Open Move to iOS on Samsung
Tap Continue on both devices
Enter the code shown on iPhone into Samsung
Select the data you want to transfer on Samsung
Tap Next and wait for the transfer to finish
Finish iPhone setup
Sign in to your Apple ID
Turn on sync for contacts, photos, messages, and other services if needed
Reinstall apps from the App Store
Manually transfer files not included in the move if needed