Get NFC tags that are writable and compatible with your device
Install an NFC writing app on your phone or use an NFC writer device
Enable NFC on your phone
Open the NFC writing app
Select the type of data you want to write
Enter the data you want on the tag
Choose the write option in the app
Hold the NFC tag near the phone’s NFC antenna
Wait for the app to confirm the write is complete
Test the tag by scanning it with an NFC-enabled device
Lock the tag if you want to prevent future changes
Save a backup of the programmed data if needed