Question: yugioh duel links how to transfer data to another phone?
Answer: Tap a gear-shaped icon.
Tap "Data Transfer Settings"
KONAMI ID or Google Play Games. You can link your game data to both a KONAMI ID, or Google Play Games. ... 
3.5 KONAMI ID. If you are using KONAMI ID, login or generate first before linking your game data to it.
Done!