Huawei ready to released android Marshmallow 6.0 OTA update for the many Huawei device.Below is the official List Huawei devices which are going to get android Marshmallow 6.0 OTA Update.The date of OTA Update on which Huawei will released the OTA update of Android M 6.0 is not yet fixed it may released the update in different phases.Once it was release you can download the Android Marshmallow Update from Setting>about phone>System Updates.
#List of Huawei Device getting android Marshmallow Update
2.Huawei Mate S
3.Huawei P8 Youth Edition
4.P8 Max, Mate 7
8.Honor 6 Plus
10.Honor 4X and Play 4C.
11.Maimang 4, G7 and G7 Plus
So it is clear that many device of Huawei will going to get official Update of Android Marshmallow 6.0 Soon .if you are using nay other band of Mobile Like motorola Then you an check the official list of motorola Device getting android marshmallow 6.0 HERE