The HG8145V5 is commonly customized and locked by ISPs (e.g., Vodafone, China Telecom, Telmex, Claro, Deutsche Telekom). You cannot install a generic Huawei firmware over an ISP-branded version without risking a bricked device.
Always check your router label:
Do not update your HG8145V5 if:
Older firmware revisions of the HG8145V5 (especially versions prior to V500R019) suffered from 2.4GHz interference and dropped 5GHz connections. Updates refine the 802.11ac/n protocols, offering better roaming and throughput. Huawei Router Hg8145v5 Firmware Update
This is the primary reason most users update. The HG8145V5 is commonly customized and locked by ISPs (e
A: Possibly, but most HG8145V5 firmwares have anti-rollback protection (hffs). Downgrading often requires a serial cable (JTAG) and is not recommended. A: Possibly, but most HG8145V5 firmwares have anti-rollback
Recovery: Some models support tftp recovery or serial console – advanced only.