The first people to get Android Oreo are those using Google devices, like the Nexus 5X or 6P, and the Google Pixel and Pixel XL. Google handles the software development for those devices and is obviously working to get the update rolled out as soon as possible, so they’ll get it first. You’ll still have to wait for your wireless carrier to sign off on the update to ensure that cellular radios keep working, but that normally doesn’t take long.
Google has said that the update will hit Pixel and Nexus devices “soon.” Google said the same thing last year about Android Nougat, and over-the-air updates rolled out a few weeks after the final beta was pushed to developers. Based on that timeline, we’d hope to see the first Nougat updates by the end of September at the latest. More devices will follow before the end of the year, and based on past experience, newer phones will get Android Oreo first. Google says that device manufacturers “including Essential, General Mobile, HMD Global Home of Nokia Phones, Huawei, HTC, Kyocera, LG, Motorola, Samsung, Sharp and Sony” will launch or update Oreo devices before the end of the year. Infinix 7.0 update is wonderful!