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Server Not Responding Error - DEVICE UNLOCK APP


There’s a few issues that may be causing this.

The phone may not have ever been originally activated by T-Mobile or MetroPCS.
The carrier may be intentionally or unintentionally blocking that IMEI, or connection from connecting to their server.
(Potentially a non-US ISP Network, a competitor’s data service, etc.)
You may not have a good Wi-Fi or Cellular Data connection, and may want to try a different connection. Reboot the phone between attempts.
The carriers recommend using your home Wi-Fi because a firewall may be preventing access to this type of connection. Since you are likely know whether or not your home wi-fi network has firewalls set up, then this is preferred.
The phone may be defective, and you may want to return it as soon as possible, either as a T-Mobile or MetroPCS carrier return, or as a manufacturer warranty return.
The phone may need a factory reset, or upgrade to the latest official firmware.

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