I have a cheap android tablet from brand allwinner A33. This is a cheap tablet from china. Every works ok, but randomly with starts showing Advertising. The problem is that I don't have nothing installed it, no playstore, no app's, just my application.
**Users don't can close my application. My application run in "fullscreen", and same that something happens and it is closed then it opens again, almost imeditally.
What I can see when this happens, is that "android" installs somes app's when begin happens, but don't have some action to install this, it is installed "alone".
I already try basic situations, how to: reset/cache, installed another version of room(owner send it to me), block advertising in android configs. But in every case the same behavior happens.
Tested Rooms android 4.4.2(default) android 4.4.4 android 5.1 **For advertising the manufacturer says he does not know anything **I know that problem is something inside of image, but I don't know what is.
In example, case I re-install a room, it don't show Advertising by 15 days, but from one moment to the next it will happens. **15 days is just a example. This can be 1 day, 2 days, 5 days or anything...simply randomly.
I try found some shell(or any executable) file inside of image, in /system/bin, xbin/, /data/app just have my app, /data/data/ apparentaly just has normal applications(I compared this with other devices). I try found the name of "automatic applications installeds" in image, but nothing will found.
These apk's that are installed also have random names, like: app.android.creditcardsystem, some times the same name that systemui and some one chinese name.
Anoher important fact is: this just happens when the tablet has internet access, that is, if the tablet don't have internet never will install app's that show Advertsing. But if the advertsing app's already installed, same without internet it show advertising.
I don't know more what can do. Has someone with the same problem? someone with solution? someone know what has inside of this image that execute this "silent install"?
I need of help Thanks