Usually yes, but not recommended. Downgrading can reintroduce security flaws. Some ISP firmwares block downgrades via version checks.
The process for manually updating the firmware is consistent across the ZXHN H168N series, and the official ZTE maintenance manual provides the following standard instructions:
There are two primary ways to manage firmware for this device, depending on whether you purchased it retail or received it from an Internet Service Provider (ISP). 1. Automatic ISP Updates zxhn h168n v22 firmware update download upd
You might be looking specifically for "V22" firmware. In the context of ZTE routers, "V22" typically refers to a major hardware revision or a specific software branch. Known firmware versions for this device include 2.2.0_pk1.2t5, V3.5.0_EG1T4_TE, and V3.5.0_TY.T6. If your router’s label or admin interface displays "V22" under the hardware version, you must use firmware compiled for that specific hardware to avoid incompatibility issues.
: Enter your admin credentials. Default credentials (like admin / admin ) are often found on a sticker on the back of the device. Usually yes, but not recommended
If the automatic check fails or you have a specific firmware file (such as a version provided by your ISP), you can upload it manually.
button in the "Check New Version" section. If a new version is found, click Update Now to download and install it automatically Wait for Reboot : The router will install the update and restart. Do not power off or unplug the device during this process Option 2: Manual Local Update The process for manually updating the firmware is
Updates frequently optimize the digital subscriber line (DSL) modem driver, improving signal-to-noise ratio (SNR) margins and reducing random line disconnections.
This is the safest way to ensure you get the correct, official file. to your router's admin page (usually 192.168.1.1 ). Go to Settings > Device Settings . Select Update Management . Click Check in the "Check New Version" section. If a version is found, click Apply or Update . Method 2: Manual Update