Currently, there is no update from the manufacturer regarding the software update for Vivo Y81. However, you can keep checking manually periodically for a software update.
To check whether your device has got an update or now, follow the following steps:
1. Go to Settings and click on system update.
2. Now press check for update. If there is an update available for your device then it will pop up if there is no update then, you will get a message saying "Your device is up to date"
Check out the complete specification of Vivo Y81 here.
Vivo Y81 has a decent camera configuration with the 13MP primary camera on the rear and a 5MP camera at the front. The quality output from both the cameras is fairly good and is enough for all your needs. It supports Digital Zoom, Auto Flash, Face detection and Touch to focus.
You can see detailed specs here: Vivo Y81