Asus Released OTA update for its Zenfone 2 ZE550ML model. This is an OTA(Over-The-Air) update. The size of the update is 155.28MB. The official changelog of the update is not available at this time but it will increase device stability and will fix many bugs. The new version is LRX21VWW-ASUS_Z008-18.104.22.168_20150507_4648_user. Users can check for the update manually by just going to Settings> About Phone> System Updates.
To Remind you Asus Zenfone 2 ZE550ML is a 2GB RAM variant with 16GB storage, 5.5-inch 720p display with Corning Gorilla Glass 3, 13MP rear camera with dual tone LED flash, 5MP front camera, Dual SIM support, 4G LTE and Android 5.0(Lollipop).