• can be flash with any mtk flash tool
• info

Patch Level : O11019
Display ID : A4003-Premio_SS644B04-201800702
Ver. CodeName : REL
Ver. Release : 8.1.0
Sec. Patch : 2018-07-05
Build Time : 1533973865
Product Model : Premio P420
Product Brand : Premio
Product Name : Premio_P420
Product Device : Premio_P420
Product Manfct : Premio
Product Info : Premio_P420
Product Board : Premio
Board Platform : mt6580