The main danger of viruses in a smartphone is the interception of SMS messages. Just imagine what will happen if a virus gains access to sending and reading SMS messages. If you have a mobile bank connected, then theoretically you can lose all your money.
Moreover, viruses are so smart that they immediately delete sent and received SMS. Therefore, I do not recommend using the SMS bank: it is better to disable it and switch completely to the banking application, which has its own protection and it is almost impossible for a virus to penetrate into the application.
And now the signs themselves. To complete the picture, it is advisable to restart (turn off and on) the smartphone. It should be understood that the signs are indirect, they do not show 100% whether there is a virus or not, since modern viruses can perfectly disguise themselves in the system.
- The smartphone is abnormally slow. Especially during a conversation or sending SMS / messages through instant messengers;
- Apps that you have not installed appear on your smartphone;
- You began to receive inflated bills for paying for cellular communications. Perhaps a virus program has connected you to various paid services or is writing off the balance via short SMS;
- You see in the sent SMS messages that you did not send. This also applies to instant messengers;
- A large number of advertisements began to appear: in applications, in the browser. Moreover, advertising is clearly aggressive and unusual;
- The battery of the smartphone suddenly began to drain quickly, although previously the charge was kept for a long time;
- The device heats up even if you do not run any powerful programs (video or games);
- High consumption of mobile traffic;
- Applications began to crash;
- Some of your account has been hacked, with the condition that you only logged into it from your smartphone.
The above signs are signs that something is wrong with your smartphone. Next, I recommend installing antivirus software (preferably paid, Doctor Web or Kaspersky (there is a trial period)) and scan the device with it.
In general, Android is designed in such a way that if you have installed too many programs on it, then it is simply impossible to understand whether there is a virus in them. Sometimes the antivirus cannot find viruses, because it has not yet studied them and virus casts have not been delivered to the laboratory of antivirus organizations.
What to do?
If you notice that the behavior of the device has become abnormal, then immediately remember what you installed. Uninstall these apps or try reinstalling them.
The best decision - carry out a factory reset (hard reset of the device). It is done in the settings. It should be understood that a hard reset will erase all data and applications, so it is better to save them to the account cloud or somewhere.
The smartphone will be exactly the way you bought it. With the same OS version and the same set of applications. All problems will go away with the dump, including those that are not related to potential infection.
It should be understood that the risk of catching a virus from the Play Market is minimal - only if you are completely downloading some unpopular application.
Basically, the Play Market moderates applications, and also checks the program at the time of download and installation for malicious code.
Often, malicious applications are installed by the user himself if he downloads and runs .apk files or “root” (gets super rights) his smartphone. In addition, the operating system also affects: the fresher it is, the lower the risk of infection.
Keep your smartphone healthy!
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