How to update 78

Please tell us some basic information before asking for help:
- Model Name:Rog phone 3
- Firmware Version:70
- Rooted or 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.
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Hi guys
Someone know where I can get manually update ???????
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https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZS661KS/UL-ASUS_I003_1-ASUS-17.0823.2008.78-1.1.63-user.zip