Since the manufacturer does not host the files publicly, the only safe way to update is through your ISP.
The hunt for the is more about persistence and ISP relationships than a simple Google search. No magic URL exists. Your safest paths are: zxhn h267a v10 firmware update link
Security experts will scream that firmware updates are vital for patching vulnerabilities (like the infamous VPN bypass flaws in ZTE routers from 2020). And they are right. However, for an ISP-locked ZXHN H267A v10, your security update path is not a link—it is a phone call. Since the manufacturer does not host the files
I recently spent several days tracking down a firmware update for the (often provided by ISPs like Claro, Telmex, or other Latin American carriers). If you are looking for a simple "click to download" link, let me save you the frustration: ZTE does not provide public firmware for this model. Your safest paths are: Security experts will scream
Official support for the router ended on October 31, 2022 , and most services, including firmware hosting, were phased out by late 2023.