If your mobile phone is lost or stolen, it is important to act quickly to protect your Telegram account and your personal information. Here is what you should do:

1. Secure Your Telegram Account:

• Log in on another device: Access your Telegram account from another device.

• Terminate Old Sessions: Go to Settings > Privacy and Security > Active Sessions (or Settings > Devices) and end the session on your lost phone. This will prevent anyone with your stolen phone from accessing your account without your password.

2. Report to Your Phone Provider

• Report the Loss: Contact your phone provider to report the loss or theft and request a replacement SIM card.

3. Update Your Phone Number (if needed):

• Change Your Number: If you need to switch to a new phone number, go to Settings, tap on your phone number, and update your Telegram number.

Taking these steps will help secure your account and minimize potential risks. This is the reason why we recommend enabling 2FA on your Telegram account, to prevent unauthorized access to your account.