Nokia 8.1

Nokia 8.1, also known as Nokia X7 in China, is a mid-high-level device released in October 2018, later Global release in December 2018.

Common issue
Nokia X7 manufactured before November 2018 have an unstable USB sub board, which will cause the USB-C port eventually got loose and unable to take charge. This issue also affected Nokia 7 Plus, Nokia 5.1 Plus, Nokia 6.1 Plus and Nokia 7.1.

Qualcomm Bootloader Issue
Since FIH Mobile didn't consider the case of unlocked bootloader for retail units, abl from all of PNX-1xxx, PNX-2xxx and PNX-3xxx firmware builds are incapable of flashing partition, and will response "Flashing is not rooted for fused device". This issue doesn't affect prototype units.

Although abl from PNX-4xxx and PNX-5xxx firmware builds fixed the issue, flashing abl individually to older firmware builds may cause the phone work unstable and boot loop. However, slot change is still unusable.

Russian market exclusive build
To be added

Serial Number Range
Note: Following content cannot be applied on prototype unit.