https://www.theregister.co.uk/2018/07/23/last_chance_modders_huawei_locks_down_its_phones_today/

The European Commission made the phrase "Android forks" a household word last week. But developers who wish to create and popularise their Android forks have just found the job got harder.

The world's No.3 phone seller, Huawei, which also sells tens of millions of Honor-brand phones each year, offered bootloader codes allowing alternative platforms such as Lineage OS (a fork of Cyanogen Mod) to run on their devices. It was by far the largest OEM offering such a service. Until now, that is.