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Device Unlock App Service - How does it work?

The Device Unlock App Service is a method of phone unlocking via server rather than by inserting an unlock code which is the traditional method. This unlocking service is the only way to unlock Android phones from T-Mobile or MetroPCS in the US that have pre-installed the Device Unlock.
 
Follow the steps below:
  1. Make sure the requirements outlined further below are met.
  2. Select the make of your phone and then either T-Mobile or MetroPCS under Network Provider.
  3. Select the Device Unlock App Service and submit your request.
  4. doctorSIM will then process your request via the server and then send you an e-mail letting you know when you can open the Device Unlock App on your phone and finalize the unlocking.
  5. Restart the phone. It is now permanently unlocked!
 
Check your phone meets the following requirements before purchasing the service:
  • The phone must be locked to either T-Mobile or MetroPCS in the US.
  • The phone has the Device Unlock App pre-installed by one of the networks in the point above.
  • You have access to the internet via 3G/4G network or WiFi.
  • The phone's IMEI number hasn't been blacklisted by the original operator (check here).
  • Neither the IMEI number nor software has been modified.
  • The following messages DO NOT appear upon launching the app: "Communication Error" or "Server not responding. Please try again later." 
 
Other posts related to Device Unlock:
 
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