President Donald Trump has been using his personal Android smartphone in the White House, according to The New York Times. Many liberal outlets have expressed concern about Trump continuing to use his personal phone because of the possibility of a security breach.

Wired reported a list of things that should be taken into consideration by President Trump when it comes to using a device that is not secured. Among those risks were phishing attacks or malware. Just clicking on one link, even if it appears to be from a trusted source, could compromise the device.

Malware could take over the phone, allowing the virus to spy on the network the device is connected to, log keystrokes, or even take over the camera and microphone — and that could be extremely bad for the president.

A hacker may even be able to access the phone to use the device’s location feature and track President Trump’s whereabouts.

One good thing is that Trump does not use email, so it’s less likely malware could be delivered to him directly. He would have to click on an unverified link for his device to be infected.

Trump was reportedly issued a locked-down device when he took office, but still uses his old phone on occasion, as tweets sent from Android seemed to confirm.