How to Unlock Huawei E5577Cs-321 Mobile Hotspot Wifi Router of Optimus Portugal?

Optimus carrier of Portugal is offering E5577Cs-321 router which carries WebUI 17.100.11.00.58. It comes with customized firmware and can be unlocked after changing the firmware.Unlocking of Huawei E5577s-321 locked to Zain Saudi Arabia and Viva Bahrain is also supported without boot shot. The firmware of E5577s model works on E5577cs device and unlocking is possible.

Requirements:

• Firmware Huawei E5577s-321 Update 21.180.99.04.00 (Universal) 
• HUAWEI Stick UTPS-V200R003B015D11SP01C983 (for win10)  
• DC Unlocker 
• Universal Master Code 
• Huawei Calculator New V4 
• Drivers (if pc not detecting the hotspot)

v4.25         v5.01

Note: Make sure that your router is charged at-least 50%.

Steps:

• Connect your Huawei E5577Cs-321 router to pc or laptop via USB cable.
• Make sure that your router is charged at-least 50%.
• Open “My Computer / This PC” and you will find a virtual CD-ROM.
• Open the virtual CD-ROM and install the drivers in your Windows computer.
• Now default IP address of E5577Cs-321 router will be automatically opened.
• If internet is connected then disconnect and close the browser.
• Run the firmware 21.180.99.04.00.
• It will ask you for password.
• Generate flash code from universal master code tool or comment below with model and IMEI to get the firmware code.
• Input the flash or firmware code in firmware update wizard when it will ask you for password.
• Wait till successfully flashing the device.
• Now install Huawei mobile partner in PC.
• Run DC unlocker and detect the device under it.
• Scan your Modem
• Enter a Code AT^NVRDEX=50503,0,128 and Press Enter from your Keyboard.
• Now it will show some nv codes.
• Now Extract Hauwei Calculator New V4 and Open it.
• Copy and Paste the Pattern 1 & Pattern 2 in Huawei Calculator New V4 as shown in below screenshots
• Now again open the Huawei Master Code and See the Unlock Code (where you see flash code)
• Paste in NCK/OEM Unlock Code
• Click Calculate Code.
• After Finishing it will the nck/oem unlock code.
• then 192.168.X.X page will open in browser and asks for SIM LOCK CODE
• enter the NCK/OEM Unlock Code in that and Unlock it.
• That's it now you can use any sim card in your Huawei E5577Cs-321 hotspot.

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