Play Store updating over Mobile Data when it is not supposed to Today I got a bit of a nasty surprise with my mobile data and I am not sure how to correct it.

In my settings for the Play Store I have (and had for ages) download only on Wifi.

This month something has changed as my phone has gone over its data allowance and looking at the list of apps and usage the top bandwidth user is the Play Store on Mobile Data with 540Mb.

I do not understand why the Play Store is updating on Mobile data even though it is not supposed to?

Under the Wifi Usage tab the Play store is also the largest user of bandwidth, which I do expect as that is what is supposed to happen.

Any ideas why Play Store is running over Mobile Data?
Google Play Store/Services does actually download stuffs over mobile data. Its a bit annoying and under certain circumstances can be quite frustrating, in cases like if someone went camping or on a trip with limited data plans, and google play used all of it to update stuffs.
Well, things you could do are, turning off mobile data when not in use, although as soon as you go online, it'll srart downloading.
Second thing you could do is, turn on powersaving mode, which reduces the amount of power consumption and also restricts background data.
Third thing you can do is enable restrict background apps which is separate from power saving as it only includes restricting apps from taking up data in the background over mobile data plans.
And the fourth and probably my favorite is to use a firewall app. Although firewall apps are build into modern Android versions, google play being a system app has an upper hand over that function. That's when a firewall app like &quot;NETGUARD&quot; comes in handy. This app basically stops all incoming and outgoing traffic from your phone (except apps that you allow) with the help of a vpn that routes to localhost. This app is hands down one of my fav so far, and yeah, might as well give it a try perhaps?
This app is available both on F-Droid and on Google Play Store. Hope this helps (: