Acquisition, decoding, and presentation of information from mobile devices are complex and challenging. Device memory is usually integrated into the device, making isolation prior to recovery difficult. In addition, manufacturers have adopted a variety of file systems and formats complicating decoding and presentation. A variety of tools and methods have been developed (both commercially and in the open-source community) to assist mobile forensics investigators. However, it is unclear to what extent these tools can present a complete view of the information held on a mobile device, or the extent the results produced by different tools are consistent. The article analyzes the features of the appointment of a forensic computer-technical examination, also addresses the issues of the appointment of a comprehensive and additional computer-technical examination. The errors arising at the appointment of the examination are considered.