SERVICE FIRM (Versão antiga)
https://androidfilehost.com/?fid=6006931924117931993

Site oficial ASUS das ATT
https://www.asus.com/Phone/ZenFone-6-ZS630KL/HelpDesk_Download/

ANDROID SDK (Drivers)
https://dl.google.com/android/repository/platform-tools_r30.0.3-windows.zip

Pasta chamada "service_firmware" (Arquivo que vai descompactar)
https://androidfilehost.com/?fid=1395089523397969054

WW-16.1220.1909.194
https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZS630KL/UL-ASUS_I01WD-ASUS-16.1220.1909.194-1.1.1-user.zip

WW-17.1810.1910.63 (Pode ser trocada por uma atual)
https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZS630KL/UL-ASUS_I01WD-ASUS-17.1810.1910.63-1.1.1-user.zip