Today, with the rapid development of communication network technology, mobile phones have become an indispensable necessities of life. Smart phones have gradually replaced the original traditional mobile phones. Mobile phones have evolved from simple communication tools to data terminals, with more and more complete functions, which is equivalent to carrying a mobile phone. Mobile phones can solve the problem of eating, drinking and playing, but with the popularity of smart phones, mobile phone crime cases continue to increase, providing some criminals with mobile phones to carry out fraud, manufacture and sell fakes, spread viruses, violate personal privacy and other illegal and criminal activities. With the development of new and efficient tools for committing crimes, the forensic phone analysis technology cannot keep up with the speed of mobile phone replacement, so the mobile phone forensics technology closely related to mobile phones has also become a new challenge in forensic work.

So what is mobile forensics? Mobile phone forensics refers to using the technical methods, working procedures and systems of electronic data inspection and identification to comprehensively, accurately and systematically recover, analyze and extract valuable information from the mobile phone under inspection, and make it into evidence recognized by the court or required by the investigation agency. Compared with computer forensics, mobile phone forensics is an emerging business area of identification work. Mobile phone data standards are not uniform, the operating system is complex and diverse, there are many manufacturers and brands, and the speed of replacement is fast. .
cell phone forensics is a part of electronic evidence. As a new type of evidence collection method, mobile phone electronic forensics technology has provided a lot of technical support in combating crimes against mobile phones and providing criminal evidence. It is composed of system memory, SIM card, memory card and mobile operator's business database, but with the popularization and powerful functions of smart phones, the research on mobile phone physical evidence technology also needs continuous development, and it is far from enough to be limited to these of.
At present, mobile phone forensics is still in the initial stage of exploration, and the development speed of mobile phone forensics technology cannot meet the requirements of smartphone update and network promotion, but there is a large amount of user information data in smartphones. The work has brought great help, and mobile phone forensics has also become an effective means of providing judicial evidence and combating crimes. Therefore, in terms of forensics technology, it is still necessary for the appraisal department to further increase its attention and comprehensively improve the level of mobile phone forensics technology.