Simply put, using a flaw thatâ€™s been called â€œStageFrightâ€ hackers could easily steal contact information, personal details, track your location and install malicious apps without your knowledge.
All they have to do is send you an infected MMS, effectively a text message with a picture, and just receiving the message is enough to infect your phone.
Security provider, Lookout, has developed a free test that will check whether your phone is at risk â€“ there are probably other test but I use, and trust, Lookout which is why Iâ€™ve made this recommendation.
If you are vulnerable, Lookout will advise you as to how you can minimise the risk â€“ but you can do this without running the test, if you wish.
Open your Text Message App, go to â€œSettingsâ€ and disable â€œAuto Retrieveâ€. You might have to do the same for Google Hangouts and Facebook Messenger too â€“ if you use them.
Now, Google is working hard on a fix but itâ€™s not going to be rolled out for a little while due to a whole range of complexities