This is a Samsung Galaxy A21 SC-42A, a SIM-free model sold by docomo, that was used as a dedicated device for "video viewing, searching, and phone calls"! As you can see, the exterior has some minor scratches and peeling of the clear coat on the frame, but the 5.8-inch LCD screen is in relatively good condition, making this a good product that highlights the "compact and simple design" unique to GALAXY! ʕ•̀ω•́ʔ✧ As far as functionality is concerned, as far as I have checked, the LCD touch, SIM communication/calls, various buttons, screen display, good sound quality/volume, Wi-Fi, tethering, etc., are all working without any problems. The battery is also very good, lasting from morning to evening with normal use! (^O^)v The best part is that it's compatible with most carriers, including "docomo," "au," and "SoftBank," as well as "mineo" with unlimited low-speed data for 900 yen," "povo" with a free basic plan and optional add-ons," "LINEMO" with 900 yen for 6 months of service," and "Rakuten Mobile" with unlimited calls and data for 2980 yen (excluding tax)! (*•̀.̫•́✧ However, this model doesn't catch these signals just by inserting a SIM card. For those who are not confident in setting it up, I can set up the APN of your preferred carrier after "initialization," update the Google Play Store, and then you can enter your Google account, etc., and it will be ready to use! (^^)d This SIM-free device has no remaining balance and is equipped with "RAM 3GB/ROM 64GB" and the latest OS "android 11." This docomo-approved model can still be used on the front lines! (^-^) 【Request to Customers!】 We will accept "cancellation requests" due to unavoidable reasons from the customer's perspective, but the return shipping costs (about 180 yen for Click Post or Smart Letter) will be the responsibility of the customer. Also, customers using convenience store payments are requested to inform us of the "exact payment date and time." m(_ _)m