Thankfully, there’s a method already available which lets you install and use Bixby’s homescreen feature on any Samsung phone running Android Nougat 7.0. If you do belong to that group, here’s how to get started. Disclaimer: This method is known to cause bootloops in some cases, hence proceed with caution as we’re not responsible for anything that happens with your phone.
First off, head over to this link to download the S8 launcher app. Next, you need to download the Bixby app which is available at this link. In case that doesn’t work, try this. Install both the applications on your device. If you’re side-loading apps for the first, you’ll need to turn on the “unknown sources” setting. Once that’s done, long-press the home button at the homescreen and head into the launcher’s settings. You’ll find a Bixby activation option there, switch it on. Now, as the last piece of the puzzle, reboot your phone to put everything in place. After the restart, Bixby should be present on the left of your homescreen. Enjoy!
For whatever reason, if you get an error stating that the package has been already configured or installed, clear the cache of the existing launcher. You can do so in the Apps settings. Bixby is, though, quite limited on non-supported handsets right now as it misses on the most distinguishing features such as the Bixby Vision. However, we do expect Samsung to officially release it for its own Galaxy lineup. That would probably happen after the S8 sales dust settles down. Until then, you’re stuck with this hack.