Zte Mc801a Firmware Patched -

ZTE MC801A Firmware Report

How to downgrade:

Follow the manual flash steps above, but select the older .BIN file.
If the tool rejects it with "Version check failed," you must first flash a "transition" firmware (e.g., B12 → B10 → B08).

Pro warning: Some carriers (T-Mobile, Three) have anti-rollback protection (ARP). Downgrading will permanently brick the modem partition. If you see "Anti-rollback check failed" in the logs, stop immediately.

Carrier-Locked Firmware

T-Mobile (USA) / TMO: Firmware is heavily customized to lock the router to T-Mobile’s network. You cannot manually change APNs. Updates are pushed by T-Mobile, not ZTE.
Optus (Australia): Known for aggressive power-saving firmware that sometimes disables 5G unnecessarily.
Three (UK): Firmware often locks bridge mode and restricts IP passthrough.
Proximus (Belgium): Unique firmware with custom VoIP settings.

Critical warning: You cannot flash a generic firmware onto a carrier-locked device without first unlocking the bootloader or using specialized flash tools. Doing so incorrectly will hard-brick the router. zte mc801a firmware

"Can't access hidden menu anymore"

Cause: Carrier locked it in newer builds.
Fix: Downgrade to a previous firmware version or use generic firmware (risky).

Part 5: Manual Firmware Installation (Advanced Users)

When OTA fails, manual flashing is the only option. Warning: This voids warranties and can brick your device if done incorrectly. ZTE MC801A Firmware Report How to downgrade:

"5G speed dropped after updating"

Cause: New firmware changed band preference.
Fix: Manually lock to the 5G band you previously used (e.g., n78) via the band lock menu.

A. Over-the-Air (OTA) – Recommended

The router automatically checks for updates.
Go to Settings > Device Management > Software Update.
If available, click "Check for update".

B. Manual Update via Web GUI (if you have a firmware file)

Download the correct .bin or .zip firmware file for your exact model and region.
In the admin panel, go to Settings > Device Management > Local Update.
Browse and select the file – do not interrupt power.