Mobile App: T-Mobile users unable to make or receive VoIP calls after upgrading to iOS 10.2 (RESOLVED)

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T-Mobile users who have recently upgraded to iOS 10.2 may be unable to make or receive calls on the RingCentral mobile app, and get the message "VoIP is Unavailable". 

This is a result of the carrier supplying only the newer IPv6 addresses, instead of a dual IPv4/IPv6address which it usually provides. 

If you are a T-Mobile user and are experiencing this problem please open a support case using the button below and in your case notes please include the details below. Or, contact Telephone or Live Chat here. 

  1. The specific RingCentral user(s) with the T-Mobile device
  2. Copy and paste the following text into the case notes:   Please enable IPv6 Support 

Note: RingCentral is pushing an update for all users and is expected to be completed by January 13th, 2017. 



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Mike, Official Rep

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Posted 2 years ago

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Mike, Official Rep

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Official Response
Letting you all know that the IPv6 support has been rolled out to production, and the "VoIP Unavailable" problem with T-Mobile users should have been resolved.  

If anyone still has issues with this please contact support and open a ticket for escalation. Thanks!

Mike