When codes fail, you have two options: throw away the router, or flash
Most modern routers can be unlocked via a 16-digit NCK code. However, the B593 is an older generation device. Many carriers have gone out of business, stopped supporting the device, or simply refuse to generate unlock codes for legacy hardware. Huawei Cpe B593 Unlock Firmware
The Huawei B593 comes in multiple hardware revisions. Look at the sticker on the bottom of your device. When codes fail, you have two options: throw