You can use it immediately just by plugging it into an outlet, without any wiring work. Notes: I have already paid for the device at the docomo shop, but the line I was using has been canceled. Therefore, after you purchase it, you will need to open a new line at a docomo shop. At that time, a phone number and a SIM card, the same as a mobile phone, will be issued for this device. There is a slot on the bottom of the device where you can insert the SIM card. After inserting the SIM card, you can use the device by plugging it into an outlet at the location where you want to use it. The login password and SSID are written on the bottom of the device. Finally, the monthly usage fee for the device will be the responsibility of the purchaser. Thank you.