After investigating the issue with several mobile providers, our Customer Care Team has learned the issue is with the way that the iPhone 6 handles calls on mobile networks using a new technology called VoLTE (Voice over LTE). . Transferred calls fail to carry over the correct caller ID information to the cellular phone.
What is the purpose of the VoLTE? Basically, VoLTE allows calls to be routed using your data connection instead of your cellular minutes. This allows the mobile carrier to more efficiently handle phone calls, but the system does not ‘play nice’ with transferred calls from business telephone systems to the iPhone.
Customers will will need to contact their mobile provider by calling 611 on your iPhone or calling the appropriate customer service number. You will need to ask the provider to do the following for each iPhone 6 on your account:
- Un-provision VoLTE on the iPhone 6
If you have multiple iPhone 6 devices on your account, the service must be removed for each one