: You may have uploaded the compressed .zip archive instead of extracting the actual firmware file first. Unzip the file and try again. Alternatively, you might have downloaded a file meant for a different hardware revision of the H267N.
Here’s a concise review of the process and resources for (a common fiber/GPON router from some ISPs like Movistar in Latin America): Update Software in ZTE ZXHN H267N
Once your settings are safe, you can proceed with the actual software installation. : You may have uploaded the compressed
Failing to prepare properly can "brick" your router, rendering it permanently unusable. Complete these checklist items before uploading any files: or Microsoft Edge).
Open a web browser (such as Google Chrome, Mozilla Firefox, or Microsoft Edge).