how to root htc one mini 2 for unlock

Manufacturer: HTC
Model: HTC One mini 2
Android OS: 4.4.2
Product Name: vodafone_uk
Project Name: M8_MINI_UL_K44_SENSE60:448014
Flash Memory: EMMC
Baseband: 1.101.1102.19.0708_10.24.4149.00L
Firmware CID: VODAP001
SerialNo: SH4C8WR00472
Secure Status: S-ON
Root Status: NO!
Reading Phone.
Root Status: NO!
Failed, phone not rooted.
Operation Failed.