According to a software release schedule from TELUS, a mobile provider from Canada, Android 6.0 Marshmallow will make its debut at the event in San Francisco on September 29th, 2015. Meanwhile, the newest Android OS will initially begin rolling out to Nexus 5 and Nexus 6, Google's own-products that will share the stage with Android M at the event.
When will Android M come to my phone?
The day October 5th will see the first taste of Android M for your Nexus 5 and Nexus 6. If you are using Nexus, you should receive and OTA update Android M soon after the event! You will access Android M via the pushed notification. But the pity is that this OS is not available to Nexus 4.
Other devices, HTC One M9 and Blackberry for example, can "eat" this marshmallow on September 24th. And Sony Xperia users can upgrade their Android four days later.
Brief features of Android M
First up, app permissions are getting simplified than ever before. Permissions will now be requested the first time you try to use a feature, not at the point of installation. In Android M, fingerprint is supported. You can unlock phones, purchases at Play Store, and open authentication APIs with the fingerprint scanner. Besides, Android M allows apps to open a Chrome window on top of the active app rather than opening the Chrome app separately.
Besides what I have mentioned, Android M is integrated with lot of new features. If you would like to read more about Android M, just start Android M Preview Tour. And let's just wait for the first debut of this amazing Android OS.