Australia Optus / Telstra Microsoft Lumia 640 sim Unlock pin at – Unlock your Microsoft Lumia 640 and use it with any network provider.
The great screen and camera make the Lumia 640 a brilliant phone for anyone on a budget who wants an alternative to Android
  • Crisp 5" HD screen with sunlight readability
  • Latest Windows Phone 8.1 experience
  • 1.2GHz Quad-core processor for seamless multitasking
  • 30GB of included OneDrive cloud storage

If you are planning to change your network provider and your Microsoft Lumia 640 is locked then you should definitely unlock it. In this tutorial you will find explained how to unlock your Microsoft Lumia 640 fast, easy and secure, using genuine unlocking codes from

The aim of this tutorial is to help you is an online unlocking platform which offers the best prices on the market, 24/7 great customer support, and has great reviews from its customers.

How do I check my Microsoft Lumia 640 phone is locked or Not?
Insert Other Carrier Sim card. if phone shows any message like below list so your Microsoft Lumia 640 phone is locked. if it accepts other Carrier Sim Card so your phone is Unlocked.
Enter restriction code or SIM card rejected
Enter special code
Enter Correct SIM
Incorrect SIM
Invalid Network SIM…Enter Code
Invalid SIM”
Phone disabled! NETWORK LOCK
Invalid Network SIM
Enter Network Unlock Pin
Enter Sim Network Unlock Pin
Enter Network Unlock Code
Enter MNC2 Code
Enter Unlock Code

How to place the order for your unique unlocking code?
Go to the WorldGSMCodes web page and fill in the order form with 3 pieces of information:

  1. The IMEI of your phone (dial *#06# on your phone and press the Call button)
  2. Your email address (the unlocking code will be emailed to you)
  3. The country and network where your phone operates (NOT the one you want to use it with)

How you will receive your unlocking code?
Once your order is been submitted, you will receive your unlocking code via email.
The time you have to wait for your unlocking code to arrive in your inbox depends upon the country and network you originally bought your phone from – it might take a few hours or a few days. Don’t worry! When ordering your unlocking code you have the possibility to choose the time-frame that suits you best.

How to insert your unlocking code?
The email containing your unlocking code includes instructions about how to insert your unlock code.
The process is really simple: you have to insert into your smartphone another SIM card from a different network provider. When you turn on your device, the message ‘Sim Network Unlock Pin’ will be displayed along with an empty space where you have to input the unlocking code.

Voila! Your Microsoft Lumia 640 is permanently unlocked and you can use it with any carrier around the world.

Benefits of using WorldGSMCodes

  • Track your order in real time using the order status section
  • 24/7 customer support team available will answer all your questions, just ask them.
  • Your phone unlocked OR your money back! Guaranteed. In the unlikely case that the unlock code doesn’t work and all the instructions sent during the process fail to unlock your phone, WorldGSMCodes guarantees your money back.

Click here to Unlock your Microsoft Lumia 640