Nokia 7 might be sold only in China, but still gets a lot of love and support from fans and developers. The 2017 midranger switched to Oreo in May and is already joining the Android Pie family, according to the official company account on Weibo. It brings plenty of new features, a November 2018 security patch and system improvements.
The update is version number 340C.B202 and is 1663 MB in size, although you need 3332 MB free storage so the package can unfold properly.
