Do you need to sign up/login APP / Why no verification code received.
It's optional, Actually the function of login app not make any sense for temporary. You can just create an account on Ellipal Titan , then connect Titan with APP.
If you forgot password of Signature , Please reset password on Ellipal Titan refer https://www.ellipal.com/blogs/support/backup-recover-cold-wallet-mnemonic
If you have no cold wallet and create hot wallet only, Please reset password on App by tapping "Add account--import via Mnemonic".