Telenor Serbia is selling E5577Cs-321 having firmware version 21.200.05.00.208 and WebUI 17.100.11.00.208. If your router has this firmware version then this post for you and you can unlock it easily without going through the hassle of changing the firmware.
How to unlock Telenor Serbia E5777Cs-321
Download and Install Drivers from here. If you are are facing problems in driver installation follow this link.
Download Unlocker v1.0 App and open it. Go to User Login (Default username and password is unlockmyrouter).
After successful login, Click on “Auto Detect Device”, your device information will get displayed.
Note: If you get the message connection failed or login failed, Download this file, extract and run it. It will open Device Manager, check if there are two Com ports. If the ports are present, Click Login/AutoDetect. If you can’t see two ports, you have to fix the driver issue.
After successful detection, Choose Prepare Device option and click submit button. It will ask you to enter a code. Enter the exact code which you have received from us.
Click OK button after entering the unlock code. You will get a confirmation message as given below.
Click on OK again. Your device will restart to prepare it for the unlocking process. Kindly wait till you get the message “Device Ready” as given below.
Choose Unlock Router option and press submit. You will get “unlock successful’ message as given in the picture below. If nothing happens, AutoDetect Router and choose Unlock Router again.
Choose Restart Device and click on submit again. Your device will restart again to apply the new settings.
Unlock code is not free. You will have to pay 6 USD to get the App Code for your Telenor E5577Cs-321. Kindly proceed only if you agree to pay the same.