Asus Zenfone 5 (A500KL) which was released in July last year, is now receiving the Android Lollipop upgrade.
The Android Lollipop update will bring the new material design, stability and performance improvements, and other bug fixes. After successful installation of latest software, your Zenfone 5 will run the version TW_V18.104.22.168. You should note that the company is advising its users to update V22.214.171.124 before jumping to Lollipop.
The latest 819.44MB Android update can be downloaded here.
The Taiwanese company is pushing the update to other Zenfones too, here is the update plan-