The router wasn't connected to a phone line. It didn't have a SIM card. But next to WAN IP , a number was flashing.
This is the simplest way to ensure you have the correct version. Routers Software & Firmware Download Huawei Routers Software & Firmware Download Huawei. Huawei Technical Support
A major technical hurdle in locating "original" firmware for the HG658b is the fragmentation of software builds. Unlike consumer retail routers which use generic firmware, the HG658b was an OEM device.
Because official links are dead, the internet archive is your friend. Search for:
⚠️ the device during the 2–5 minute process. 2. Emergency Recovery (If Bricked) If the web interface is inaccessible: Power off the router. Hold the Reset button while plugging the power back in. Keep holding until the power light flashes rapidly.
Is your home network feeling sluggish, or are you running into strange connection drops? The culprit might be outdated firmware on your Huawei HG658b Wireless Gateway