To save your account, you can go to the "Data Transfer Settings" from the Gear icon when you are in-game, then choose "Data Transfer with KONAMI ID". Register a new account if you don't have it yet and bind it to the account.
June 7th update
Recently, there were problems associated with making a KONAMI ID, which has now been fixed, but a new method to save your account is now added as well. You can now set up a data transfer to back up your account using Google Play Games. Simply log in to your Google Play account when you are in-game, and choose "Data Transfer Setup (Google Play Games)" in the Data Transfer Settings.
Setting up a data transfer
1. Tap a gear-shaped icon
2. Tap "Data Transfer Settings"
3. KONAMI ID or Google Play Games
You can link your game data to both a KONAMI ID, or Google Play Games. In case one of them isn't available, you can use the other to restore your data. You can link your game data to a different KONAMI ID, or Google Play Games if you accidentally used a different or wrong account, but it will replace the previous one. If you plan on transferring from using Google Play services to iTunes, make sure you use KONAMI ID instead.
3.5 KONAMI ID
If you are using KONAMI ID, login or generate first before linking your game data to it.
If you did everything correctly, your account is now saved so you don't have to worry about losing it if your phone is broken, a data error or if you uninstall the game. You will have to re-download all of the data files though.
Using your account on a different device
When you want to use your account on a different device, you will need to log in to your account. When you first launch the game, before you tap "INITIATE LINK!", tap the button below for "Data Transfer" and log into your account.
If you set up using a KONAMI ID, simply log in to your registered account that you linked your game data to. If you are using Google Play Services, make sure you are logged in to the right account.
If you lost your account before you managed set up a data transfer, you can try recovering it from the "Contact Us" and "Submit Player Data Recovery Inquiry" from the gear icon in-game.
1. Tap a gear-shaped icon
2. Tap "Contact Us"
3. Read through the description & Tap the button
4. Submit inquiry
You will need to provide your information as accurately as possible for them to be able to identify that it is yours. Simply giving them your player ID is not enough, since anyone can look that up and is not a very reliable information. Try to remember stuff like deck names, latest card obtained of certain rarity or what device you used it on.
Next step is to wait patiently and check your email for a reply from their support team.
When I went to data transfer my account to my new phone somehow my old phone got overwritten by the new profile on yuhgioh. Now everytime I try konami Id login it just sends me back to the new profile that I dont want. My email never changed and now I'm stuck with this new profile on both phones
Can anyone help me find my ID searching for my account in the look for a friend page? My username is (probably) Zero. I say probably because I was playing two years ago so I don´t remember if I had any details on my username. But you will probably find it easier because of how many days it has been without logged in.
I'm trying to do a data transfer before I apply the new update but I'm still getting a server error. If anyone knows a way around this I'd greatly appreciate it. I've set up a Konami ID and done the data transfer before. Do I need to do the transfer again so I can apply the new update? Since I've set up the transfer before what will happen if I uninstall the game from my mobile phone and then reinstall it. Will I lose all my progress and have to start again, or will my progress still be intact?
Ken(last update) latest
Thank you for contacting KONAMI Customer Support. We appreciate your effort for contacting us and we apologize for the inconvenience. Regarding your concern, kindly be informed that we will confirm this matter with the department-in-charge. Rest assured that we will contact you immediately once we have an update about this. We ask for your kind patience in the matter.
Maybe see if anyone on social media, here or other forums are talking about putting a case together. I'd be happy to offer any testimony I can, though I doubt it would mean as much as someone's who's suffered financial loss.
You’re lucky you got that far. My phone was stolen, so I bought a new one, unaware of the need of linking your account to a Konami ID. I attempted answering the survey they offer to prove it’s really my account. Twice. They said “the conditions did not match” so they can’t help me and that when I start over I should link my account. I’ve been playing for 2 years. I REALLY don’t want to start over.
So i did the transfer the wrong way and wiped my main data off with a fresh version, ffs