Does my phone have a virus?

If your phone is randomly having performance issues and other sudden behavioral changes affecting your usage, it might be infected with malware.

How Do I Know If My Android Has Malware Or Virus; Steps To Remove It

How to tell if your phone or tablet has a virus

How to Remove Viruses From Android Phones

Mobile Malware. Signs you've got it and what to do next.

Verify: iPhone virus warning messages

9 Signs Your Phone Isn't Your Private Zone Anymore

My Smartphone Is Too Hot: Does It Have a Virus?

11 Signs Your Android Has A Virus & How To Remove Them

How to Clean an Android or iPhone from Viruses for Free

Does My Phone Have a Virus? How to Remove a Virus from Your Phone