To ensure data is unrecoverable on a lost or stolen mobile device, the best solution is:
Remote wipe: This feature allows the device owner or IT administrator to remotely erase all data on the device, ensuring that it cannot be recovered by unauthorized users.
Device encryption: While important for protecting data, encryption alone does not remove data from the device.
Data backup: Ensures data is saved elsewhere but does not make it unrecoverable on the lost or stolen device.
Fingerprint reader: Provides security for accessing the device but does not affect data recovery if the device is compromised.
Reference:
CompTIA A+ 220-1102 Exam Objectives, Section 2.7: Explain common methods for securing mobile and embedded devices.
Mobile device security practices documentation.