The smartphone in your pocket - which may act as a valuable lifeline to friends and loved ones - might also be helping an abuser spy on you, read your private messages, and stalk your location.
Yes, Microsoft provides a way for you to avoid opening up your home Wi-Fi to strangers - but why isn't that the default?
iOS, Android and Windows Phone devices are being targeted by fraudsters, earning vast amounts of money through invisible ads that are feasting on your data plan and using up your battery.
Vivino, a popular smartphone app that allows wine-lovers to scan their favourite bottles of plonk and share recommendations with their friends, has left a sour taste in the mouth - after a security researcher found a privacy vulnerability.
Learn more in my article on the Hot for Security blog.
Always be careful about what you download - even if it comes from an official app store.
Kaspersky researchers find bogus versions of their products in the Windows Phone and Android stores.
Bogus Windows Phone versions of Gmail, Google Plus, Google Hangouts and other Google apps are found in Microsoft's official app store.
But Microsoft says tough luck smartphone users.
It isn't going to proactively police the Windows Phone store for dodgy apps.
Is this a cheap shot by Microsoft?
Or are they right to highlight the malware problem on Android smartphones?
Free Windows phones are being offered by Microsoft to users who describe their Android malware problems.
Read more in my article at Naked Security.