Microsoft has begun the rollout of Windows 10 Anniversary Update for Windows 10 Mobile, more than two weeks after making the update available for PC users.

The Anniversary Update brings all the additional features and improvements for Windows 10 phone, the company said. These include Windows Ink, Cortana improvements, a faster and power-efficient Microsoft Edge browser, advanced security features for consumers as well as enterprise, new gaming experience and new tools for modern classroom.

To check manually if the update is available, head over to Settings>> Update & security>> Phone update>> Check for updates. Not all mobile users would be able to get the update at the moment. Microsoft explains:"Note that availability may vary by manufacturer, model, country or region, mobile operator or service provider, hardware limitations and other factors."

Upon the update you should see the build version of the phone is bumped to 14393.67, the same version which was released for Windows Insiders recently. The update weighs in at 916.3MB. The Lumia phones that are eligible to get the Anniversary Update are Lumia 930, 1520, 830, 735, 730, 640 XL, 640, 635 (with 1GB RAM), 540, 535, 532, 435 and 430.

You could consider doing a few things before you go ahead with the update. Ensure that the phone is connected to the charger so that it does not run out of battery during the update. Also, connect the phone to a stable Wi-Fi network. Do not forget to create a backup of your settings, apps, photos and texts to the cloud before installing the update. For this, go to Start, then swipe over all to the All apps list and then select Settings>> Backup and follow the on-screen instructions.

Most important is you need to have enough storage space to download and install the update. You might use the Upgrade Advisor app which recommends files including videos and photos that you can move to OneDrive or an SD card. Alternatively, just connect the phone to the PC and transfer all your files and then once the upgrade is over you can move back the files to your phone.