Fixes drops during switches between 4G and 5G.
Whether you are looking to flash a generic global firmware, unlock a carrier-branded device, or fix instability issues, understanding the 2021 firmware ecosystem is essential. Why the 2021 Firmware Updates Matter
Log in using the default password found on the sticker under the router.
If an update is found, select or Download and Update . The device will restart automatically. Method 2: Manual Update (Using Official Tools) zte mc801a firmware 2021
Often, firmware released around mid-2021 would start with version numbers like BD_EELISAMC801AV1.0.0Bxx .
Certain 2021 ISP-branded firmware strips out advanced features like custom DNS settings or bridging mode. How to Check Your Current Firmware Version
If you're still running older software or facing issues, here’s how to manage your device: Fixes drops during switches between 4G and 5G
Offers an open web interface but may lack specific network optimizations for your local carrier. 2. Key Features and Limitations of 2021 Firmware
The year 2021 was a transitional period for global 5G networks. Network carriers rolled out standalone (SA) and non-standalone (NSA) networks simultaneously. ZTE released several firmware revisions to keep pace with these infrastructure changes.
Meanwhile, international firmware versions, such as the , became a topic of interest for enthusiasts looking to unlock new features. However, flashing such firmware was fraught with risk, with one user reporting, "I have now flashed the Saudi B05 firmware and it boots but if I restore my NVRAM it bricks". German T-Mobile users speculated that European versions would receive no further updates, with updates only continuing for China and Saudi Arabia. This speculation would be proven partially correct later. If an update is found, select or Download and Update
ZTE typically releases firmware updates in .bin format through their official support portal . Method 1: Local File Update (Recommended for 2021 Versions)
: The unit features two TS-9 ports for external antennas, which are particularly effective for the 3.6GHz 5G band . Managing Your 2021 Firmware
What specific are you hoping to achieve with a firmware update or tweak?
Locate the physical Reset button hole on the bottom or back of the router. Use a paperclip to press and hold it down for 10 seconds while the device is powered on. This restores factory settings. 2. Router Stuck in a Boot Loop (Flashing Lights)