This is a docomo tablet, d-tab (d42A). I purchased it in February 2021 and used it only for watching Diva and other content. The device functions well. I am selling it because I upgraded to a new model. I used it with a case, so I think it's in relatively good condition. I also have the case, but it has some scratches. I can include it if you'd like. I had it initialized at a docomo shop. They said it can be used in a Wi-Fi environment. You'll also need to log in with Gmail. I used it connected to Wi-Fi without a SIM card. There is a slot for a SIM card. Maximum battery capacity: 80% or more I don't know the gigabyte capacity! It was required, so I chose the lowest option. Functional issues: None Storage capacity: 16GB