If a user registered with a phone number, they can still bind an email address after logging in.
After logging into your Bityi account, select "Account" from the floating menu under the "Profile Icon" in the upper-right corner of the page.
Choose "Security."
Locate "Email " and click "Setting."
Enter your email address, click "Send Verification Code." Under "Email Verification," click "Send Verification Code" again. The system will send verification codes to both your phone and email. Check them, enter the codes, and click "Confirm" to complete the process.
