Hardware is decent (AC WiFi, 4 Gigabit ports). Firmware update policy is a frustrating black box. Two stars for lack of transparency.
If you have obtained a valid firmware file, follow these steps to apply it: zxhn h267a v10 firmware update link
If you are looking for specific regional or unbranded firmware versions, community forums and repositories sometimes host archived files. Installing the wrong regional firmware can brick your device or lose your internet settings. Regional Firmware (O2 Czech Republic): ZXHN H267A FV105 CZ2T11 (.bin) ZXHN H267A FV105 CZ2T1 (.bin) Community Repositories: Hardware is decent (AC WiFi, 4 Gigabit ports)
If your ISP refuses, consider buying your own retail router (e.g., TP-Link, Asus) and putting the ZTE H267A V10 into bridge mode. That is often safer and more effective than chasing a dangerous firmware link. If you have obtained a valid firmware file,