EVERYONE. I have found a way to speed unlock the Fiido d2s and every other fiido. Okay. First download the app, (Fiido riding) set up an account, and connect it to your bike. Click on the bike and you should see an unlock button to turn off and on the bike. And a map icon and a cycling icon. But in the top right, there’s an settings icon, click on that, and on the bottom, of that page, there’s something called “rocket switch” when you click on that, it asks you to put in a code. NO you can’t set it to your own code, I tried that. BUT the code IS “398219” type that, and press “relieve” and a speed icon on the bike itself should appear. Congrats you just unlocked you bike. If there’s any issues, you can dm me. You’re welcome