Malicious SIM cards can be used to hijack smartphones, according to a report from gadget.co.za published on Monday, August 31, 2026. The outlet detailed how these compromised cards pose a direct threat to mobile device security.
The report, titled "How malicious SIM cards hijack smartphones," explains the mechanism behind the attack. gadget.co.za indicates that the threat originates from the SIM card itself, which acts as the authentication key for a user's mobile identity. When a SIM card is tampered with or replaced with a malicious version, it can grant an attacker control over the device's network functions.
gadget.co.za's coverage highlights that this is a distinct attack vector compared to software-based malware. Instead of exploiting an app or operating system flaw, the attack targets the hardware component that carriers and users trust to secure the connection. The potential consequences, as outlined by the outlet, include unauthorized access to calls, messages, and data linked to the phone number.
The timing of the report, published late in August 2026, suggests ongoing concern within the cybersecurity community about physical-layer attacks. While the full technical details were not available in the summary, the headline itself confirms that the hijacking is a real and documented risk.
What to watch next: Expect further analysis from security researchers on how users can verify the integrity of their SIM cards and what carriers can do to detect compromised hardware.
