I am selling the docomo 5G Home Router HR01. I checked with AI, and the following information was provided. Please note that I have not personally verified this information, so consider it as a reference. Docomo's home router "HR01" is a SIM-free device. Because it is not SIM-locked, it can be used with SIM cards from communication carriers other than Docomo. You can insert and use SIMs from Rakuten Mobile, ahamo, povo, etc. C ※Steps to use other companies' SIMs (briefly) 1. Replace the SIM card (replace from the slot on the bottom) 2. Log in to the management screen and change the APN settings 3. Restart the router and start communication A C ※Important points • Because the supported bands are limited, it is not compatible with some frequencies of au and SoftBank C • Communication will not be possible unless the APN information of the SIM you are using is set correctly • The speed may be slow depending on the area, such as with Rakuten Mobile. If you want to reuse the HR01 by purchasing it used, it is SIM-free, so you can re-contract or operate it with another company's SIM.