GOOGLE has a warning for millions of Android users over downloads you should avoid.
The downloads have been modified and risk cybercriminals hacking your device.
"Google provides device security protections to people around the world using the Android operating system.
"If you installed a modified (rooted) version of Android on your device, you lose some of the security protection provided by Google," the tech giant explains.
Android users are advised to only update their phones and devices with the official Android software.
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"If you signed up for the Advanced Protection Program, using a modified version of Android can compromise Advanced Protection’s security features," Google added.
If you do download a modified version of Android software you could face several risks.
This includes missed security updates that stop cybercriminals from hacking your phone.
"Automatic security updates help keep Android devices safe.
"Modified versions of Android don’t get automatic security updates from Google, potentially making your device and data more vulnerable to hackers," Google explains.
You also risk downloading apps that aren't approved by Google.
Apps that aren't on the Google Play Store can be risky and result in malware being downloaded onto your device.
You also risk your money and personal details being taken by these apps.
"Unapproved apps might contain harmful software designed for purposes like stealing sensitive data or damaging your device," Google says.
Modified software will also have no built-in security from Google itself.
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"Android has security features designed to protect your device from harmful software, phishing, and vulnerabilities.
"With a modified version of Android, these Google security features are compromised," Google says.
If you have downloaded a modified version of Android software, Google advised redownloading an official version.
The steps to do this can vary depending on how you originally downloaded the modified version.