Skip to content

How to save your Messenger account if your number has been intercepted#

March 13, 2026

How to save your Messenger account if your number has been intercepted

Imagine a Monday morning: you pick up your phone to answer messages, only to find your family and friends texting you on other messaging apps that they're sending strange requests to transfer money in your name. You lose access to your work chats, client database, and personal correspondence. This isn't a horror movie scenario, but the reality of 2026—scammers have learned to intercept phone numbers and steal messaging accounts in minutes. We'll explore how this happens and, most importantly, how to protect yourself.

Contents#

How an account is stolen using a phone number#

Before discussing protection, we need to understand the mechanism. Contrary to popular belief, hackers don't "hack" messaging app servers—they attack the most vulnerable link: the SMS identity verification process.

Method 1: SIM swap (reissuing a SIM card)#

This is the most dangerous and widespread method in 2025-2026. Fraudsters collect the victim's personal data from leaks (passport information, date of birth, address), go to a mobile phone store, and, posing as you, ask for a SIM card reissue. The carrier blocks your SIM card and issues a new one to the scammers. Your phone displays "No Service," while theirs receives all SMS messages, including verification codes. Now they install WhatsApp on their device, enter your number, receive the SMS code, and — the account is yours, and access is theirs.

Method 2: Voicemail – the silent killer#

Scammers request a verification code via "Call Me." You don't pick up? The automated message with the code goes to voicemail. Most users never change the default voicemail PIN (0000 or 1234). The scammers call your voicemail remotely, enter the default PIN, and listen to the message with the code.

Method 3: Attacking the SS7 protocol#

The most technically complex, yet effective method. Fraudsters exploit vulnerabilities in the global mobile network (SS7 protocol) to redirect an SMS with a verification code to their device. You don't even receive a notification, and your account is already in the wrong hands.

Key takeaway: A code from an SMS is no longer a defense. It's simply the first door scammers have learned to open. What should you do?

How messengers protect us#

Each popular messaging app offers its own set of tools. Let's look at WhatsApp and Telegram — their approaches to security and how to use them most effectively.

WhatsApp: A New Era with Password Protection#

Current Security Level

For a long time, WhatsApp's primary defense was two-factor authentication (2FA). This is a 6-digit PIN code that is requested after entering an SMS code. However, scammers who gain access to your number can try to reset this PIN as well.

What's New

In February 2026, WhatsApp began testing a revolutionary feature: account passwords. Now users will have a third, independent line of defense.

A password is not just a PIN, but a complete alphanumeric combination of 6 to 20 characters (at least one letter and one number are required). The system even evaluates the strength of the password when it is set.

How it works when logging in:

  • You enter the SMS code

  • If 2FA is enabled, enter the PIN

  • And only then – your password

Even if scammers intercepted your SMS and somehow learned your 2FA code, they won't gain access without your password.

How to set up maximum security in WhatsApp right now:

  • Make sure to enable two-step authentication. Settings → Account → Two-step authentication. Set a PIN and be sure to include a recovery email.

  • Stay tuned. As soon as the password feature becomes available (estimated in 2026), enable it immediately.

  • Check your linked devices. Regularly go to Settings → Linked devices and remove any unfamiliar ones.

MAX: A Messenger with a Focus on Privacy#

MAX, actively expanding in 40 countries, offers its own set of security mechanisms focused on local threats.

Two-Factor Authentication with a Cloud Password

MAX implements a classic yet reliable system: login is confirmed with an SMS code and a cloud password. The password must be strong—at least one letter and several numbers. During setup, the system prompts you to create a hint (unobvious to an attacker) and provide a recovery email.

Where to set it up: Profile → Privacy → Two-Factor Authentication → Set Password.

Additional Security Features

MAX also implements smart alerts for calls from unknown numbers. When an unknown number calls, a "Not in Contacts" banner appears, and for international calls, the country is displayed. This helps prevent social engineering.

For private communication, MAX features a "Secret Chat" feature with end-to-end encryption. This is the perfect place to discuss sensitive topics and share important data.

Telegram: Advanced Security for Advanced Users#

Telegram has traditionally been considered one of the most secure messaging apps, and 2026 is no exception.

Next-Generation Two-Factor Authentication

Telegram's two-factor protection is especially robust. In addition to the standard cloud password, it now supports TOTP (one-time codes, like Google Authenticator) and biometrics. This means that even if your SMS is intercepted, attackers will need either your physical token or biometric data.

Where to set it up: Settings → Privacy and Security → Two-Factor Authentication. Set a password and, if possible, enable TOTP. Be sure to save the 8-word recovery code in a safe place (paper or a password manager).

Active Session Checking

Telegram has the most transparent device monitoring mechanism. Go to Settings → Devices → Active Sessions. If you see a device that doesn't belong to you (for example, "iPhone 6" when you have an Android), immediately end the session. Here's a life hack: click "End All" right now, and then calmly set up protection again.

Secret Chats vs. Cloud Chats

It's important to understand the difference. Regular Telegram chats are stored in the cloud and accessible from any device. Secret Chats use end-to-end encryption, don't leave your device, and support message self-destruction. The rule is simple: passwords, financial information, and seed phrases are only in Secret Chats.

What to do right now#

We've compiled all the recommendations into one short guide. Follow these steps today and sleep soundly.

Recommendations#

In-App Settings

✅ Enable two-factor authentication in all messaging apps.

✅ Link a current recovery email (this is critical!).

✅ Set a strong password in WhatsApp when the feature becomes available.

✅ Check and end all unknown active sessions.

✅ Limit the visibility of your profile photo and phone number to contacts only.

✅ Use secret chats for confidential information.

Mobile operator settings

✅ Set a strong PIN for your SIM card.

✅ Activate port-out blocking—a service that prevents SIM card reissues without your presence and passport.

✅ Disable voicemail if you don't use it, or change the default PIN.

Digital habits

✅ Never share codes from SMS messages with anyone—even if they say "friend" or "support."

✅ Respond to unexpected verification codes—if you receive a notification you didn't request, it's an attack.

✅ If your phone loses network coverage even though you have a good signal, contact your carrier immediately.

What to do if your account has already been hijacked#

Keep calm and act quickly.

  • Get your number back. If it was a SIM swap, contact your carrier immediately, verify your identity, and get your number back.

  • Start the "tug of war." Try reinstalling WhatsApp/Telegram and registering with your number. After you enter the SMS code, the attacker will be automatically logged out.

  • If they ask for your 2FA PIN and you don't know it, don't panic. In WhatsApp, after you enter the SMS code, a 7-day waiting period begins, after which the PIN is reset. The attacker is no longer logged into your account, but you can't log in yet. This is a security mechanism.

  • Contact support. For example, in Telegram, write to recover@telegram.org and be prepared to provide your registration date and recent contact information.

  • Warn your contacts. Notify your loved ones and colleagues through another channel (call, another messenger) that you have been hacked so that they do not fall for fraudulent requests.

Conclusion#

Account hijacking through phone number interception isn't just a fairy tale; it's a real threat in 2026. But it's not a death sentence either. Messengers are actively developing security: WhatsApp is implementing passwords and Telegram is offering advanced authentication methods. Your task is to take advantage of these tools.

Take 15 minutes today. Enable two-factor authentication everywhere you use it. Check your active sessions. Set a PIN on your SIM card. It will take less time than reading this article and will save you weeks of headaches and data loss.

GREEN-API provides comprehensive solutions for integrating WhatsApp into business processes. Learn how our solutions can help your company automate support and improve efficiency – contact us for a consultation.