Flashing an RPKG is not like standard Fastboot. Nokia uses a modified flashing tool: OST LA (Online Support Tool for Launcher) or the more advanced Nokia Care Suite (Phoenix Service Tool).
To understand the ROMs, we first must clarify the hardware, as "Nokia X7" refers to two distinct devices from different eras, and the term "RPKG" is almost exclusively associated with the modern Android version. nokia x7 rom rpkg
The rest of this text assumes you are looking for information regarding the Modern Nokia X7 (2019). Flashing an RPKG is not like standard Fastboot
The RPKG (Resource Package) ROM is the encrypted firmware update format used by Nokia’s PC Suite/OVI Suite to flash or restore Nokia X7 devices. Unlike plain .bin or .img files, RPKG files contain signed firmware partitions (ROFS, core OS, modem). For enthusiasts, working with RPKG is the gateway to debranding, reviving dead phones, or manually updating beyond official OTA support. The rest of this text assumes you are