It depends on the bootloader. Some versions block downgrades. If allowed, same process.
You should use the portable (manual) method when:
If you are trying to customize the config file using utilities like zte-config-utility , be aware that newer firmware might have enhanced encryption, causing decode.py to fail. zte f671y firmware update portable
Portable firmware update usually preserves SIM lock status. Do not flash carrier-agnostic firmware on a locked device unless you intend to unlock.
Even with a perfect process, issues arise. Here is how to solve them without losing your mind (or your device). It depends on the bootloader
What or feature requirement is prompting you to upgrade? Share public link
[Computer] --(Ethernet Cable)-- [LAN Port] ZTE F671Y [PON Port] --(DISCONNECTED) You should use the portable (manual) method when:
Save your current settings so you can restore your ISP configurations instantly after the update.