Description:
It is impossible to log in to an existing Telegram account on Android. After entering the phone number, email address, and the verification code sent to that email, the app shows the error EMAIL_NOT_ALLOWED and refuses to complete the login. This completely blocks access to the account (Blocker severity).
Steps to reproduce:
Open Google Play Store.
Download and install the official Telegram app (version 12.6.4).
Launch Telegram.
Tap "Log in" and enter a valid phone number linked to an existing Telegram account.
Choose to log in using email and enter a valid email address.
Enter the verification code received at this email address.
Tap to continue / log in.
Actual result:
A popup appears with the error EMAIL_NOT_ALLOWED. The login process is not completed. The user cannot access their existing Telegram account on this device.
Expected result:
After entering the correct verification code received by email, the login process should complete successfully without the EMAIL_NOT_ALLOWED error.
Device: Android App version: Telegram 12.6.4 (Google Play Store)
Steps to reproduce
Open Google Play Store.
Search for Telegram and install the official app (version 12.6.4).
Launch Telegram.
Tap "Log in" and enter a valid phone number linked to an existing Telegram account.
When prompted, choose to log in using email and enter a valid email address.
Enter the verification code received at this email address.
Tap to continue / log in.
→ Error EMAIL_NOT_ALLOWED is displayed and login fails.