I just got the LG V10 and started seeing these popup ads all over, even on the lock screen when charging. When reading up on the problem including all the ones listed in other threads, I looked at my Google play apps and didn't find any of the described apps, what I read somewhere was about a keyboard, so looking again at the apps I found an app called Flash Keyboard, I uninstalled it and poof all the ads are gone. One happy camper with this phone now.