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Upgrade Asus zenfone live L1 ZA550KL to android 9.0?

Star III
Please tell us some basic information before asking for help:
Model Name: Asus zenfone live L1 (ZA550KL (2gB RAM
Firmware Version:WW_ZA550KL_15.01.2003.137_20200307
Rooted or not: NOPE
I want to upgrade my system but when i saw the firmware says that it upgrades to android 10 developer version so i think i t will be unestable? what firmware i have to download?

Community Legend II
Hi Deus é maior
Thank you for your reply. Kindly provide the information below so that we could better assist you.
1. Your current firmware version
Settings>System>About Phone>Build Number
If you try to update to the latest version, does the issue still remain?
2. Which firmware do you want to update?
3. Make sure your zip file is downloaded completely.
Use PC to download, then put the file into the root dictionary of the internal storage, aka the outermost place you could put into.>Re-boot>Tap the pop-up notification "system update"

To avoid any misunderstanding in the conversation, please provide me further information in English.