Hi friends
Thank you for your asking. For cross-Android version updating, please perform manual update as the guide below. Please make sure update to previous Andriod L before the first Andiod M, then update to the first Andiod M version.
Steps of Update:
1. Check software version of your device (Settings->About-> software information->Build number)
2. Download device software and Update SOP (From “Manual” Item)
3. Only apply to same SKU update, Example: WW->WW, CN->CN, .
4. Software update cannot transfer the software SKU and downgrade the software version.
5. Wrong SKU may cause update failure, please update the same SKU version only.
*System upgrade may cause part of data missing, please buckup your important data before system upgrading
# ZE550KL Firmware Spot
ZenFone 2 (ZE550ML) BIOS & FIRMWARE | Phone | ASUS Global# ZE551KL Firmware Spot
ZenFone 2 Laser (ZE551KL) BIOS & FIRMWARE | Phone | ASUS Global
