I have a YouMail voicemail account (free), which allows me to have voicemails from calls I don’t pick up emailed to me. That way I can listen to them, whether I have my phone with me, or not. I love that service. Yesterday, I upgraded to the iPhone 6. The (still) current instructions on YouMail’s website indicate that one must dial an *004* code to activate "conditional forwarding," like so: *004*3478966996# This results in an error. I just confirmed with an AT&T technical support rep that the sequence that works is **21*3478966996# This might have worked on phones prior to the iPhone 6, as well, but I have no way of testing it now. Just wanted to document this.