I bought my 180 two months ago. The ear piece stopped working. The service department is going to replace the 180. I asked them if I could do one of the followings:
1. Have the exchange be a 180g.
2. Pay to upgrade to a 270.

They said no to both. If I understand correctlly the 180g is not selling well, so I thought they would have liked that option. The upgrade to a 270 would have given them more of my money.