Firmware for Huawei ONTs uses a specific naming convention. For the HG8145V5-V2, you may see names like:
Unlocking Your EchoLife HG8145V5: Admin Password Guide - Ftp huawei hg8145v5-v2 firmware download
If you need help tracking down a specific version or configuring your connection, tell me: Who is your ? Firmware for Huawei ONTs uses a specific naming convention