What is a common sign of a possible security breach on a mobile device?

Frequent application crashes can be a common sign of a possible security breach on a mobile device because they may indicate that malicious software is interfering with normal application functionality. When a device is compromised, malware can disrupt processes, leading to unusually high crash rates for applications. In addition, unexpected behavior, such as apps crashing frequently without user intervention, can suggest that the integrity of the device has been compromised, warranting further investigation.

In contrast, regular software updates are intended to enhance security and functionality and are not a sign of a breach. Device warranty expiration is irrelevant to security incidents and relates more to the support and service aspects of the device. Low battery notifications, while they can indicate problems with device usage or power management, do not signify a security breach.