If you sign in on your Discord Application, you will not receive an OTP Code or a Verification Code. So how will you solve this problem in this blog, I will tell you. So read my blog carefully.
Go to Settings. Then go to App Manager. Then click on Messages Application. Then click on Force Stop. Then go to Storage. Then you have to Clear Cache. Then go to Permissions. Then you have to Enable SMS permission. If it is already enabled then disable it and then enable it. Doing this will solve your problem. Now you can sign in to the Discord application to see if the Verification Code OTP is being received or not. If not received then try the second method.