E5577cs-321 is now being sold by Germany Telecom but with the restriction to use only the sim card by the same network provider. The good news is that, if your E5577Cs-321 has the firmware version 21.328.62.00.55 or lower then you can unlock your German Telecom E5577Cs-321 router easily without going through any hassle of dismantling the router. The process which is prescribed below will unlock E5577Cs-321 router without opening the screws.
Steps to unlock E5777Cs-321 German Telecom Router
Download German Telecom e5577Cs-321 Unlock App. Extract using WinRar or any other utility and open it. Click the login button (username and password is unlockmyrouter).
Once the login is successful, Click the button “Auto Detect Device”. Wait for your device information to get displayed.
Note: You might get the message
connection failed or login failed. To fix that, Download this file, extract and run it. It will enable the Com-Ports. Open the device manager of your computer and check if the two ports are generated. If yes, Click AutoDetect again. If you can’t find two ports, means your computer has driver issues which can be fixed by following the procedure provided at the link -> fix the driver issue.
If the router detection is successful as shown in the picture above, choose Flash Firmware and click the submit button. You will be asked to enter a code. Enter the unlock code which you have received from us after the payment and click OK.
Your E5577Cs-321 router will now restart to prepare for the firmware installation and the display screen should show a circular icon as given below.
Within a few seconds, the firmware installation process will begin and you will be able to see the progress in the unlocking app.
Don’t interrupt the process and wait for the installation to complete.
You will see the “Flashing Completed Successfully” Message. Wait for around 2-3 minute, select Unlock Option and press Submit. You will be asked to enter a code.
Enter the correct code and click the OK button. The unlocking app will show “Unlock Successful” message.
Your German Telecom E5577Cs-321 is now unlocked and free of all the restrictions placed by your network operator. Select Restart option and click Submit to restart your router and so that the new settings can be applied.
Unlock code is not free and can be received by paying 6 USD. After successful payment, you will receive the code via email.