On my Xperia J phone Google Play Store setting of automatic updates is set to: Wi-fi only.
To my greatest surprise, yesterday it started to download 50MBs of updates when I was on 3G and my 200MB package was almost exceeded.
I checked the Data usage of Google Play Store on my 3G network and on Wifi: Wifi has 432 MB traffic, 3G has 82 MB (with wifi-only settings).
My question is: what settings should I use to prevent the abuse of my 3G package? Have you experienced similar behavior?