How to Upgrade Asus Zenfone 5 (T00I) to Android Kitkat 4.4

Sir,I want to know how can I upgrade to Android 4.4 on my new Zenfone 5 phone. the phone came with Android 4.3 and now it is saying that update is available but only Android 4.3.5 . But I see on website that it is upgradable to 4.4 kitkat. But I can't find any instruction given and any process to explain it

I did quick search on internet for you and found that there is no update yet for Zenfone 5. Though they have promised that in near future you will get Android 4.4 Kitkat upgrade, but when, its not disclosed, most probably you will receive OTA update.