I believe the usage period was about 1-2 years. I have kept it in storage after changing models. I used a cover and screen film, so I think it's in good condition with no noticeable scratches. Full charging is possible. Operation has been confirmed. The device has been initialized. (Kids' phones require phonebook registration of contacts, so the setup screen will appear when you turn it on.) [Concerns] There are marks on the back of the main unit, likely from rubbing against the cover. The string for the security alarm is dirty. If you are concerned, please use a different string. The silicone cover I used has discoloration and dirt, but I will include it to protect the main unit during shipping. Please discard it if you don't need it. I cannot answer questions regarding settings. Please check with a Docomo shop. To prevent trouble, please purchase this if you are able to handle the procedures and settings yourself after purchase. Returns are not accepted for reasons other than the product itself.