This release addresses three critical vulnerabilities discovered in prior 9.0.x builds:
This standard, non-unlocked bootloader technique applies official update files via the stock recovery environment. Hdl-l0j 9.1.0.155
Since this device is a carrier-specific model (NTT Docomo), updates are usually pushed Over-The-Air (OTA). Ensure the device has at least 50% charge. Hdl-l0j 9.1.0.155
It is possible this string refers to one of the following: Hdl-l0j 9.1.0.155