Users can chose to protect their phone by enabling a PIN.

In this article, we'll talk about how cell-phone viruses spread, what they can do and how you can protect your phone from current and future threats.

Cyber Threats to Mobile Phones This paper describes various cyber threats to smartphones and feature phones, describes some of the consequences of such attacks, and offers tips on protecting your mobile phone.

And how can you protect your phone?

Since smart phones are like miniature computers, many of the same privacy and safety concerns apply; however, unlike computers, these devices do not have anti-virus software to protect your phone from malware attacks, spyware, or text message spam.

It's not like I installed it thinking it would be protecting my phone, only to find out it was secretly sending private information.