For similar money to a used P9, you can buy a modern budget phone that runs Android 14 or 15 out of the box with guaranteed updates:
This article is for informational purposes. Modifying your device’s software may void warranties, brick your phone, or compromise security. Proceed at your own risk. huawei p9 update android 10
Although a beta was tested and released for some Chinese variants, Huawei ultimately cancelled the global rollout due to hardware performance concerns. For similar money to a used P9, you
Officially, the Huawei P9's journey ended with and EMUI 5.0 globally. brick your phone