Many users of the new iPhone 6 and 6 Plus models are finding it impossible to re-link with Google Voice for voicemail. When entering in the classic **004*1[GV-Number]# sequence users are seeing a "Setting Registration Failed" message instead of the happy success note. Our testing leads us to believe this is a limitation of the new NFC-capable SIMs in the new iPhones. Regardless, Marcel Brown sorted this out and you have two ways you can enable Google Voice on your new phone. First is to call AT&T and have them set up "conditional call forwarding" for you, or you can set up the 3 big use cases all by yourself with some slightly different commands. "234567890" in Marcel's examples would be replaced with your Google Voice number, including area code:
- Call Forward if Unanswered: *61*1234567890#
- Call Forward if Unreachable: *62*1234567890#
- Call Forward if Busy: *67*1234567890#
Set all three of these and you're good to go. To check the status of these enter *#61#, *#62# and *#67# respectively. To deactivate, enter ##61#, ##62# and/or ##67#. Enjoy!
Check It Out: How-To Make iOS 8 and iPhone 6 Work With Google Voice