Android users may notice ads popping up automatically after finishing a phone call, which is a cause for concern. This is not a feature of the operating system but rather a deceptive scheme known as the AfterCall scam.
Understanding the AfterCall Scam
Security researchers have identified numerous applications on the Google Play Store capable of displaying ads over the Android interface. These scams exploit the overlay permissions that users unknowingly grant to seemingly harmless utility apps.
How the Scam Operates
Common apps such as calendars, alarms, and notepads are often the vehicles for spreading the AfterCall scam. Once installed, these apps request overlay permissions, allowing them to appear over other applications. When a user ends a call, the app launches a full-screen ad disguised as a fake call information screen.
Since these ads mimic parts of the call interface, users are less likely to suspect malicious activity. The ads that appear after a call are not linked to the utility apps installed, making it hard to trace their origin.
Identifying and Removing Suspicious Apps
Overlay permissions cannot be granted through standard pop-up prompts during installation. They fall into the category of "special permissions" that require users to manually enable them in the system settings. Apps should ideally request these permissions contextually, providing a clear justification.
Scammers may claim that an alarm needs overlay permission to function correctly. Some apps might even crash if users deny the requested permissions. Because the ads appear out of context—after phone calls and with content unrelated to installed utility apps—users find it challenging to identify the source of the problem.
If you experience ads after phone calls, the first step is to check the apps with overlay permissions. Navigate to Settings > Apps > Special app access (which may be hidden in a three-dot menu) and select the overlay permission type. Look for unknown apps or those that shouldn't have the "display over other apps" permission and uninstall them.
Regular Permission Audits
It is advisable for users to routinely audit these permissions and disable any that are not essential. While these apps generally only serve as annoyances and do not explicitly collect sensitive data, installing programs that request unnecessary permissions still poses significant risks.
For users, the AfterCall scam is more of a nuisance than a dangerous malware capable of stealing personal information. However, these applications waste brand advertising funds and can damage their reputations. Ultimately, users want to find a way to stop the ads that appear after phone calls.
Prevention Strategies
The best preventive measure is to carefully check the permissions requested by apps before installing them. Simple utility apps like calendars or notepads do not require overlay permissions for normal operation. If an app requests this permission without a clear reason, it’s best to avoid installing it.
While the Google Play Store has worked to crack down on such apps, some still manage to evade verification. Users need to remain vigilant and proactive in protecting their Android devices. By conducting regular permission audits, the risk of encountering the AfterCall scam can be significantly reduced.
For those who fall victim to the AfterCall scam, resorting to a factory reset may be necessary if intrusive ads persist even after deleting suspicious apps. However, this should be a last resort after other methods have failed.
It’s important to remember that mobile device security is a shared responsibility between users and the platform. By understanding how the AfterCall scam operates and taking preventive measures, users can enjoy a safer and more enjoyable Android experience.
Source: https://telset.id/how-to/waspada-aftercall-scam-iklan-muncul-setelah-telepon-di-android
