For many a year, Android users have been seeing a familiar dialog saying 'Android is upgrading' when the operating system updates or in the event a new ROM is flashed, stopping them from using the device until it has finished optimizing apps. Those days are over: with Android 7.1, the 'Android is upgrading' process is now carried out in the background.

In 7.0, this dialog was sped up considerably - as Ryan says, it's almost instant. However, the Android team has gone one step further and removed it completely in 7.1, allowing the process to be carried out mostly silently, apart from a notification in the shade telling you it's doing this, and a progress bar indicating how far it is from complete.

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