[10] The device also features a 64-bit 2.0 GHz octa-core Qualcomm Snapdragon 810 system-on-chip with 3 GB of RAM.

[12] Xperia Z5 also features a redesigned power button located on the right side of the device with a fingerprint recognition system which can be used to unlock the phone.

[13] However, the fingerprint sensor is disabled in the US version of the phone[14] due to a "business decision",[15] although it can be reenabled by modifying the firmware.

[18] On first week of March 2016, Sony released the Android 6.0 Marshmallow software update for the Xperia Z5.

[20] The update started rolling out in January 2017, but was put on hold shortly thereafter upon "reports from some users experiencing inconsistencies related to audio playback via third-party apps and SD card encrypted data read performance.