I laughed at many people saying they got messages on their phone of fake advertising of batteries with viruses, OS with viruses websites and so on, until the day I was doing a demonstration to my friend of a website I liked and these popups started coming out during the experiment and making it vibrate in loop, ringing for attention and stuff.
In that moment I decided, counterattack it.
First:
Avoid basic browser of your phone, most appreciated is Firefox/Chrome
Download the addon called uBlock or AdBlock, that will be very userful in your adventure on visiting websites without the problem of fake warnings and stuff.
Important:
If you accidentally clicked ok on an advertising of those, cancel immediately the download
If you downloaded it, delete it on the fly!
Always carry a good Antivirus, or, if you are worried or paranoid, go for Malwarebytes antimalware, a specialist for PC now is even on androids.
I would like to add one more tip. DO NOT SIDE LOAD APPS AT ANY COST even if its Pokemon Go
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That's another good argument, but now Pokemon Go is on the official store, so no need of downloading it elsewhere.
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Not where I live
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