Solved! How to prevent all popup ads?

You need to figure out which app you are using that is causing the ads. The phone itself isn't the cause. Think on what apps you installed recently and when the ads started popping up. Then I would suggest uninstalling the app(s) that you installed just before it started happening. Then restart the phone (turn it off and back on) and see if you get any more ads. If you do not, then you know you removed the correct app(s). If you still get them, then you need to check for other apps that may be the cause. Alas, once you figure out what app was the cause, then you will have to decide if you want the app bad enough to put up with the ads.