Most cable modems are easy to install, so long as the building is properly wired for cable internet, but you’ll still need to register it with your ISP in order to get internet service. If you plan on installing it yourself, call your ISP’s technical support team beforehand and ask them to walk you through the process and complete the necessary hardware registration. If you’re not comfortable setting up technical gear, you can make an appointment with an installer from your ISP, although fees may apply.