After the game updated to a new version about a month ago or less, Klab added a new “Transfer Code” system that will require also a Transfer ID for switching devices and keep your account somewhat safer.
Soon, there will be two sections of information to put the Transfer Code and Transfer ID. This will be set up around April and after the end of Challenge Festival event that is now on. I’d suggest everyone to remember this and screenshot, write down or anything else your Transfer Code and Transfer ID as soon as possible to avoid issues or loss of your account by mistake!
Transfer Code: this code WILL change everytime you “require” a new code and whenever you switch devices.
Transfer ID: this code will NOT change when you “require” a new code.