Windows: Type `TM` and replace with `™` using Alt code `Alt + 0153`
Mac: Press `Option + 2`
iPhone/iPad: Hold `T` or use the text replacement for `™`
Android: Long-press `T` or use the symbols keyboard to select `™`
Microsoft Word: Type `TM` and press `Ctrl + Alt + T`
Copy and paste: `™`
HTML: Use `™`
Unicode: `U+2122`