Saami keyboards for computer and mobile phone
Keyboard layouts on the computer
For all modern operative systems (Linux, Mac, Windows) there are ready installed keyboard layouts for North Saami, and in some cases also other Saami languages. See the language and keyboard settings on your computer.
Keyboard layouts on the mobile phone
Giellatekno and Divvun have made a package containing keyboard layouts for seven Saami languages for Android and iPhone. You may download and install them for free. Note that the keyboards do not have contain predictive writing or proofing.