Struggling to do a command forward for voicemail on iPhone 6 for AT&T and other GSM networks, like:
And this is frustrating you because the iPhone 6 continues to report an error?
Here is the work around using specific Conditional Call Forwarding codes (replace 1234567890 with the number you are forwarding to, like your Google Voice number, for example):
- Call Forward if Unanswered: *61*1234567890#
- Call Forward if Unreachable: *62*1234567890#
- Call Forward if Busy: *67*1234567890#
Each of these discrete commands should accomplish the same goal.