Unfortunately you have installed an App that promised the moon, and now your Smartphone is infected with Malware. Cases like this are especially possible with Android, and the symptoms can be quite noticeable. These can involve slowing down any operation, a heavily used data connection without you currently doing anything or signing up for various services without your consent.
Well said, sometimes these problems are also due to a program that has major programming flaws. Other times “wild” subscriptions can happen simply by visiting a page and triggering the fraudulent subscription. These problems are not always due to various viruses.
But, let’s say there is a Malware circulating in our system. How should we start to defend ourselves, possibly without doing a factory reset?
First of all a note: if you have Rooted your Android, things can get a lot more serious. Also check if, for some reason, the malware itself did not Root. We ask you this because when your Android is unprotected in this way, the infection can reach the OS recovery files and remain installed even after performing a factory reset.
First of all, enter the Safe mode. In most cases, you can do this by holding down the power button until you are given the choice of turning off or restarting the phone. Then press and hold your finger on the shutdown icon for a long time. You will be given the offer to reboot in Safe mode. Other cell phones may have different ways of achieving this same result.
Once the mobile is started under this mode, enter the settings and then under the installed Apps. Eliminate any App that seems foreign to you, consult the network if necessary, then turn off and on your mobile phone. Check if anything has changed.
If the problem persists, you can try to install an Antivirus like Avast’s ( https://play.google.com/store/apps/details?id=com.avast.android.mobilesecurity ). But generally antivirus are not able to clean the Root, provided that the Virus is nestled in this section of the system.
If the Root has been infected and the malware is quite advanced, you will have to install the ROM of your mobile phone from scratch, and you can do this by several means. But before you get to do this, do a factory reset.