The signs of a virus on your phone, including malware on your phone are overheating, sudden poor performance and slowness as well as rapid battery drain, aggressive pop-up ads, unexplained data usage, unexpected app installations, apples crashing, strange messages or calls from your phone number.
Common signs of phone viruses and malware are apps suddenly and constantly freezing or crashing, phone slowing down or the phone overheats.
Contacts receive spam or strange messages from your number.
Apps you didn't install appear or your homepage and search engine changes.
Excessive, unwanted pop-ups or new tabs while browsing appear.
Spikes in data usage and unexplained increase in mobile data usage.
And the battery on your phone depletes much faster than it usually does, as malware runs in the background.
To remove malware from your phone, first reboot your phone in Safe Mode (Android) or check app settings (iPhone), then uninstall suspicious apps, run an antivirus scan, clear cache/data, disable browser notifications, and if all else fails, perform a factory reset as a last resort, ensuring you back up important data first.