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T-Mobile Rolling Out Wi-Fi Calling for Lumia 521 Now

May 20, 2013 1 Comment

T-Mobile via an over the air update is rolling out Wi-Fi calling for the new Nokia Lumia 521 Windows Phone.



On May 20, a software update to Software version 1030.6409.1316.0016 will be released for the Nokia Lumia 521. The software update, which will be available by Over The Air (OTA), will add Wi-Fi calling.

Important: A master reset is required:

  • After completing the update, you will be required to complete a master reset to add the Wi-Fi calling feature.
  • It is recommended you back up your device settings, applications, and text messages through your Microsoft account and photos through SkyDrive.
  • See also: Back up device data

Microsoft will send notification that the software update is available, but you can manually pull the over the air update when it is available by going to phone update > check for updates.

Windows Phone Version 8.0 / Software version 1030.6409.1316.0016 – Current version


  • Windows Phone version 8.0
  • Software/firmware number 1030.6409.1316.0016
  • Updated 5/20/2013


  • Wi-Fi Calling


  • OTA update
  • Device is running OS version 8.0 / Firmware number 1030.6409.1311.0011
  • More than 50% battery life
  • 150 MB available memory (File size of update is 150 MB)

Windows Phone Version 8.0 / Software version 1030.6409.1311.0011


  • T-Mobile 4G (21 Mbps)
  • 1GHz dual-core processor
  • Expandable memory
  • Nokia Music
  • HERE Drive (formerly Nokia Drive)
  • HERE Maps (formerly Nokia Maps)
  • Business Ready (Outlook, Office Integration)
  • Microsoft Store (formerly Windows Marketplace)


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