When I'm out traveling and my 6 switches to Extended and I try to make a call it tells me to enter the 10 digit number and don't hit send so I do this and the call goes through. This is a real pain when I'm driving and it just started doing this a few months ago. It will have 4-5 bars on Extended and I have to still do this. I assumed it would switch to a different carriers towers and work like it has done in the past. I've called in and nothing has changed. I've also been missing calls that most times don't show up in my recent or missed calls list but they do go to voicemail. That's frustrating too.