If you don't have reliable Wi-Fi, you can use your PC or Mac.
While you can set up your Kobo entirely over Wi-Fi, some users prefer using the Kobo Desktop app via a USB connection. 2. Setting Up via Wi-Fi (Recommended) This is the most convenient method for most users. www.kobosetup.com
Set up your eReader with Wi Fi or your computer - Rakuten Kobo If you don't have reliable Wi-Fi, you can use your PC or Mac
Setting Up Your New Kobo Ereader: A Complete Guide to www.kobosetup.com If you don't have reliable Wi-Fi
Use the provided USB cable to plug your Kobo into your computer. Tap "Connect" on the Ereader screen.