Windows: hold `Alt` and type `0205` on the numeric keypad for `Í`
Windows: hold `Alt` and type `0237` on the numeric keypad for `í`
Mac: press `Option` + `E`, then `I` for `í`
Mac: press `Option` + `E`, then `Shift` + `I` for `Í`
iPhone/iPad: press and hold `I`, then select `Í` or `í`
Android: press and hold `I`, then select `Í` or `í`
Copy and paste: `Í` `í`