Please tell us some basic information before asking for help: Model Name: A501CG Firmware Version: Android 5 Rooted or not: Not Frequency of Occurrence: APP Name & APP Version (If your issue relates to the app): In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc. ======================================== Hello, I'm new here, anyone can please tell me how to upgrade? Thanks. Good day!
After taking a look at your model number your zenfone 5 is 2015 model and asus has policy to update its devices upto 18 months so no more updates to your model Latest version for A501CG is Android 5 (lollipop) Thanks!