If you know someone you trust who uses Tails already, you can install your Tails by cloning their Tails:

• Install by cloning from another Tails on PC
• Install by cloning from another Tails on Mac

Tails doesn't work on smartphones or tablets. The hardware of smartphones and tablets is very different from the hardware of computers. For now, it's impossible to make smartphone and tablet hardware work with Linux distributions like Tails.