1. PTA Begins Action Against WhatsApp Accounts Linked to Inactive SIMs
The Pakistan Telecommunication Authority (PTA) has reportedly started blocking WhatsApp accounts registered with inactive, cancelled or no-longer-used mobile SIM cards as part of efforts to strengthen digital security and prevent the misuse of mobile numbers.
According to reports published on October 28 and 29, 2026, PTA officials confirmed that the process had begun following an awareness campaign encouraging users to keep their WhatsApp accounts linked to active mobile numbers under their control.
The development follows earlier warnings from the telecom regulator about the security risks associated with messaging accounts registered to SIM cards that are no longer active.
In September 2026, PTA advised users that accounts connected to inactive or cancelled numbers could face restrictions and urged subscribers to update their registration details.
The latest reports indicate that the authority has moved from issuing warnings to implementing measures against potentially vulnerable accounts.
Key developments include:
Regulatory authority: Pakistan Telecommunication Authority (PTA).
Latest reports: October 28–29, 2026.
Affected accounts: WhatsApp accounts associated with inactive, cancelled or no-longer-used SIM cards.
Primary concern: Fraud, unauthorised account access and misuse of mobile numbers.
User guidance: Maintain an active, properly registered mobile number linked to WhatsApp.
Accounts affected so far: No verified nationwide figure has been publicly disclosed.
The action should not be confused with a general restriction on WhatsApp services in Pakistan.
Current reporting specifically concerns accounts associated with inactive or cancelled mobile numbers.
However, the precise technical process used to restrict individual WhatsApp accounts has not been publicly explained in detail.
2. Why Inactive SIM Cards Can Put WhatsApp Accounts at Risk
PTA has warned that WhatsApp accounts connected to inactive mobile numbers can create significant security risks, particularly when those numbers are no longer controlled by their original users.
Telecommunication operators may eventually reassign cancelled or inactive mobile numbers to new subscribers under their applicable procedures.
When a number changes ownership, the previous user may lose the ability to receive verification calls or text messages needed to register or recover a WhatsApp account.
This can create opportunities for unauthorised access, identity misuse or fraud if the original account remains associated with the reassigned number.
The regulator's warnings focus on reducing these risks and encouraging users to maintain control of the phone numbers connected to their digital accounts.
WhatsApp normally uses phone-number verification as an important part of account registration. Consequently, continued control of the registered number is important for account security and recovery.
Major security concerns include:
Mobile numbers being reassigned to different subscribers.
Difficulty receiving account verification codes.
Potential loss of access to existing WhatsApp accounts.
Fraudulent activity involving numbers no longer controlled by their original users.
Identity impersonation and misuse of messaging accounts.
Complications when restoring an account after changing phones.
However, an inactive SIM does not automatically mean that all WhatsApp chats are immediately deleted or that every affected account has already been blocked.
The reported initiative focuses on reducing potential security risks, while the actual impact on individual users may depend on their SIM status and account circumstances.
The development also highlights the growing importance of mobile numbers as a component of digital identity in Pakistan.
3. How Pakistani WhatsApp Users Can Protect Their Accounts
PTA has urged mobile phone users to verify the status of their SIM cards and ensure that their WhatsApp accounts remain connected to active numbers they currently possess and control.
Users who have changed their mobile numbers should update their WhatsApp registration rather than continue relying on an old or cancelled SIM.
WhatsApp provides a built-in Change Number feature that allows users to move their account registration to another eligible phone number.
Steps to change a WhatsApp number:
Open WhatsApp on your primary mobile phone.
Go to Settings and select Account.
Tap Change Number and select Next.
Enter your existing and new mobile numbers in the required format.
Follow the instructions to verify the new number.
The new mobile number must be active and capable of receiving verification messages or calls.
WhatsApp's official guidance explains that the feature can transfer account information, settings and group memberships to the new number. Users should also create an updated chat backup where appropriate.
Additional precautions recommended for users:
Confirm that the mobile number registered on WhatsApp is still active.
Contact your mobile operator if your SIM has been deactivated or cancelled.
Update WhatsApp promptly after changing mobile numbers.
Enable WhatsApp's two-step verification.
Never share account verification codes with unknown individuals.
Avoid suspicious links and messages claiming that immediate payment is required to prevent account blocking.
Keep recovery and account security information up to date.
Pakistanis living abroad who continue using WhatsApp with Pakistani mobile numbers should also check that their registered SIMs remain active and under their control.
Users should rely on official PTA communications, their mobile network operators and WhatsApp's support resources for account-specific guidance.
Although several news outlets report that blocking has begun, the authorities have not publicly released a comprehensive breakdown of affected accounts, an implementation timetable or detailed technical procedures.
The development underlines the need for stronger awareness of mobile account security, particularly as messaging applications continue to play an important role in personal, commercial and professional communication.
Editor's Note
Radar Pakistan will continue monitoring official PTA announcements, WhatsApp account security advisories and developments involving inactive SIM cards. Reports indicate that restrictions have begun, but the exact number of affected accounts and the technical implementation process remain unconfirmed. Users are advised to consult official sources before making changes to their accounts.
