MacRumors reader Brandon and several other iPhone users confirmed the change.
Finally Wind Mobile in Canada is suddenly using native iMessage. You used to have to only use your Apple ID for iMessage and FaceTime because it was unsupported on Wind's network. Today, suddenly it started working. I have confirmed it with an Apple Genius, and I myself am a former Apple technician as well.Apple released iOS 9.0.2 last week with a fix for an issue that prevented iMessage activation for some users, but it is more likely the change was made by Wind Mobile given that iPhones running previous software versions such as iOS 8.4 also now have iMessage activation by SMS.
Apple does not list Wind Mobile as a supported wireless carrier on its website. Canadian carriers that officially support the iPhone include the big three networks Bell, Rogers and Telus, prepaid carriers Fido, Koodo and Virgin Mobile and regional carriers Eastlink, MTS, SaskTel, TbayTel and Videotron.
Wind Mobile is a bargain carrier in Canada, offering affordable rate plans with unlimited talk, text and data for between $25 and $50 per month. Wind Mobile's coverage area is mainly limited to larger cities, however, such as the Calgary, Edmonton, Ottawa, Toronto and Vancouver metro areas.