If your mobile phone contains work documents, losing it can prove disastrous for you and your business. With that in mind, more hardware companies are rolling out supersecure models. We ranked the following phones, each of which features robust 256-bit encryption, by their souped-up security features.

The new 5-ounce HTC One features advanced options for unlocking the phone's screen, including face detection and drawing a pattern. As with the other phones here, you can fully encrypt all data on the HTC One under Settings. The Android 4.1.2 phone has front- and rear-facing cameras, a bright 4.7-inch screen, and a superfast Qualcomm Snapdragon 600 processor. Another plus? The phone lasts for an impressive 18 hours of talk time. Cost: $199 for 32GB of storage and a two-year contract with Sprint, AT&T, or T-Mobile

Samsung Galaxy S 4
More secure
This 4.6-ounce Android 4.2 phone includes Knox, a feature that provides extra security for work-related files and apps. Using the free Samsung for Enterprise service, your IT staff can wipe phone data remotely and require a strong password to unlock the screen. The S 4 also offers advanced unlock options, including face detection. The phone, which has a large 5-inch display and front- and rear-facing cameras, will be available this spring through several carriers, including AT&T and Verizon. Information on battery life and pricing was not available at presstime, but comparable Samsung models have retailed at $199 for 16GB of storage and a two-year contract.

BlackBerry Z10
Most secure
This 4.8-ounce phone has a built-in, highly sophisticated security feature, BlackBerry Balance, that separates and secures work and personal information on the phone. (For example, it prevents users from pasting contents of work emails into emails in personal accounts.) IT staff can add and remove work apps remotely. The phone has a 4.2-inch touchscreen and front- and rear-facing cameras, and it lasts for about 10 hours of talk time. It comes with apps for Linked­In and Dropbox. Cost: $199 for 16GB of storage and a two-year contract from AT&T or Verizon