How To Fix a Hacked Android Phone

how to fix a jailbroken cell phone.

by Alex Gustman

Updated: July 10, 2021

Hackers regularly use various schemes to hack into android smartphones for profit or fun. Here is a detailed guide on how to secure your mobile device and how to block access to an already hacked android phone.

Signs of smartphone hacking

Hacking a mobile device is not always a prominent and visible process. Often hackers act invisibly to get as much of your data as possible. So you should be wary if there are events on your android phone from the list below – these are the main signs of hacking your smartphone:

  • Advertising is shown everywhere, even in applications without advertising. Including pop-ups with ads.
  • The device is slow, and the performance has dropped significantly.
  • Internet traffic consumption has increased significantly.
  • The battery runs out quickly.
  • The device heats up noticeably during operation or when idle.
  • Randomly launch applications, send messages or make calls to unfamiliar numbers.
  • Cannot disconnect or reboot your mobile device.
  • You cannot disable mobile or wireless data transmission.
  • Your phone receives messages with links to confirm banking transactions.
  • Funds are deducted from your bank account.

How to protect your android phone from hacking

Here are some actions to help you fix the hacked device. The recommendations will also help to secure the device and reduce the possibility of successful hacking in the future.

Remove dangerous applications from your device

If malware is detected, remove it immediately. Attackers foresee your actions, so they block the removal function in every way. In this case, “safe mode” will help.

Remove dangerous applications.

In Safe Mode, only standard programs are downloaded, and nothing prevents the removal of malicious applications. Safe Mode will also allow important data to be saved to be reset in case a malicious program refuses to be removed.

Set Up Two-Factor Authentication (2FA)

Your Google Account has two-factor authentication – validation of the owner when you attempt to login in two or more ways. In addition to entering a login and password, you need to confirm authorization through a code that comes in an SMS to the phone number specified in the settings. If possible, it is recommended to use this method of approval in all available services, including banking and financial applications.

Change your passwords

If your device is hacked, change passwords on all sites that contain your valuable personal information or have access to finances. Use passwords with complex combinations of numbers and letters, as simple combinations are easy to guess or match. Do not use the same password on more than one resource.

Change your passwords.

Periodic password changes are recommended, as user databases are sometimes stolen and then sold. Regular password changes will make stolen databases irrelevant.

Use biometric authentication

Do not ignore the presence of a fingerprint scanner. You can use the fingerprint sensor not only to unlock the screen but also to access specific applications.

Block the installation of applications from unknown sources

Android, by default, only allows the installation of applications from Google Play. To install programs from other sources, you need to activate the appropriate function in the settings. Up to version 7 of Android, this feature can be found in the “Security” settings section. Starting from version 8 of Android, this feature will be activated separately in the settings of each application. Check and disable the option to install apps from untested sources.

Block the installation of applications from unknown sources.

Install updates in time 

From time to time, security patches come to the mobile device designed to address previously identified vulnerabilities. Often attackers use vulnerabilities to hack into the device or access data. So visit the “Updates” section in your system settings to check for available security patches. 

It should be noted that updates are released only the first few years after the release of the mobile device. Then the manufacturer terminates support in favor of more modern models. Maximum long-term support from the manufacturer only for the flagships.

Install updates.

Turn off debugging via USB

Initially the “Debug via USB” function is locked. If you visited the developer section earlier and enabled debugging via USB, now turn off debugging. This mode is used by cybercriminals to crack the device when it is connected to a USB port in public places.

It is recommended not to recharge your mobile device via the USB port in hotels, airports, or dining areas as this connection makes it easier to hack into the mobile device. Use usual outlets for charging, which require the charger to be connected.

Turn off debugging via USB.

What does it look like when your phone is hacked?

If your phone has been hacked or a malicious virus has settled in, it is difficult to notice. Usually viruses and hackers act in such a way that you cannot notice that your phone has been hacked or infected. That’s why users usually don’t notice anything. However, there are a number of circumstantial signs that can tell you that your phone has been hacked.

  • You may notice that some data is missing from the phone or other service, traffic consumption has increased.
  • More emails that have not been read appear to have been viewed.
  • Certain services are activated or deactivated.
  • Money is deducted from the card or mobile operator’s account.


Is there an app to see if your phone has been hacked?

Some antivirus programs tell the user about vulnerabilities in the phone that can be exploited by hackers.

Can a hacker see me through my phone?

Yes, if he gets access to the camera, for example through an app with granted access to the camera.

Can your phone be hacked without you knowing?

Yes, by taking advantage of security holes. That’s why it’s important to update the software in a timely manner.

Is there a short code to check if my phone has been hacked?

No, there is no such code. You can check number forwarding to avoid forwarding calls, messages and other data to another phone number.

What does *# 21 do to your Android phone?

The code *#21# allows you to see forwarding to other numbers.

Can someone hack my phone and read my texts?

Yes. For example, through a program with provided access to messages.

Can someone read my text messages from their phone?

Yes, in the case of hacking or accessing data that allows you to log in to your account or messaging program.

Can someone hack into your phone by texting you?

Yes, if there is a link to a site in the text or if there is a malicious file attached to the email. Therefore, it is better not to read emails from unknown numbers and emails.

What happens when your phone number is hacked?

An intruder will have access to various information. They may steal some data, money, or ruin your reputation.

What can hackers do with your phone number?

The phone number is often used to log into various services and banking applications. Attackers can enter a certain service and read correspondence or write off funds. Hackers can also arrange for services or purchases at your expense, etc.


This article describes in detail the recommendations on how to fix a hacked Android phone. The presented solutions will help owners to eliminate hacking as well as exclude possible attempts to hack a mobile device in the future. Besides, it is important to adhere to digital security: not to visit dubious resources, not to click on unknown links in letters, as well as not to distribute confidential data on the Internet and social networks.

If you know of other ways to fix a hacked Android phone, share your experience in the comments below.

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About the author 

Alex Gustman

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