Until the last firmware upgarde, all of our Yealink phone ring tones were the same. We have the T28's and the T38's. I installed the 126.96.36.199 update from here http://www.yealink.com/SupportDownloadfiles_detail.aspx?CateId=184&flag=142 and after that all of the ring tones changed from what they were - and different between the two models. I'm sure I can edit the provisioning profiles to get them to be the same. Just wondering if this is the correct approach! ...or should I just install the 188.8.131.52 - that doesn't say it has official 3CX support?