The error “Device Not Supported” occurs when your smartphone hardware isn’t compatible with the game’s graphics.
You can fix this error by following all the instructions below.
1. First, you will need to Uninstall Fortnite.
2. And go to Google chrome.
3. Type “gsm for fortnite” and open the very first link.
4. After that, click on apk download.
5. And open up the downloaded file.
6. Next, you will need to click on Install.
7. And open up the installed game.
8. You have to click on “Yes, Find My Account”.
9. And then click on “sign in with epic games”.