How do we track mobile phone?
At present, there really aren't any practical alternatives. You can't improve security without making the hardware larger, heavier, expensive, power-hungry and incompatible with popular software. A four digit pin is going to get cracked in minutes, even with a low-end PC. However, that's not where the problems usually lie. To get to the filesystem, you must first access the system. If you can do that, it's usually game over - particularly on the Android, where much of the security built into Linux is either disabled or removed. Android cannot be considered a secure OS, whereas the Linux kernel it is built from is used in EAL5+ (ie: highly secure) systems. A person would not have to hack the pin (although 10,000 possible combinations is incredibly small), logging the keystrokes would tell them everything they need. If someone just wants notes and emails written, a logger will give them that without the bother of getting to the filesystem.Note that most of this appl...