I might need to mention how such RAR files were typically used back then, the software that was common for extracting them (like WinRAR), and the ecosystem around mobile internet during that time.
Perhaps focus more on the role of such software in the mobile internet landscape of the mid-2000s, and how it contributed to the development of mobile data technologies, even if the specific product is obsolete now.
Also, consider the context of users needing to manually install drivers for GSM modems. It was common to have USB Dongles with setup floppy disks or CDs, but sometimes users had to seek out driver updates, which might have been distributed as RAR files online.