Hi Norman, do note that you will only be able to get by with this each time AG Mobile shall officially roll out updates for the Chrome Selfie device model. Otherwise, you may want to toy with custom ROMs (which thing is not advisable for ordinary device users are it entails a risk of bricking devices). Moreover, the steps below are as well the only quickest way to find out the availability of updates.
1. Launch the Settings app
2. Scroll to "About Phone"
3. Tap "Softwate Update"
4. Tap Update and accept any warning or disclaimer ...
Let us know if there be any other thing. An SP Flash Tool ready stock ROM is here: http://roms.satechhelp.co.za/product/ag-chrome-selfie-firmwarerom/