However, even legends need a software tune-up. If your B593 has been acting sluggish, dropping connections, or failing to connect to modern 4G bands, a might be the fix you need.
Older B593 units fail to register IMS. A new firmware (B239 or later) includes a file ims_config.bin . After upgrade, dial *#*#4636#*#* (Android style) via the router’s debug interface to re-register. huawei lte cpe b593 4g router firmware upgrade
If your version ends in B100 or B150 , you are critically outdated. However, even legends need a software tune-up
A legitimate firmware file looks like: B593s-22_UPDATE_V200R001B239D04SP00C00.bin or B593s-82_WebUI_13.100.03.00.03.bin huawei lte cpe b593 4g router firmware upgrade