This is an OPPO Reno3 A smartphone, the UQ Mobile version. I purchased it new and used it for about a year and a half. It's the UQ Mobile version, but it's SIM-free and could be used with Ymobile. It's dual SIM, so you can use two SIM cards. I used it with UQ and Ymobile SIMs. It's a used item, so there are minor scratches, but there are no issues with its functionality. Please refrain from purchasing if you are sensitive to such things or seek perfection. IMEI (SIM slot 1): 863985045037833 IMEI (SIM slot 2): 863985045037825 OS: Android version 11 All accessories at the time of purchase are unused except for the cover. Note: This smartphone does not support 5G, so it cannot be used even if you insert a 5G-compatible SIM card. Wi-Fi only is available. First come, first served. Carrier at purchase...UQ mobile Included items...Charging cable, AC adapter, instruction manual, box Series...OPPO Model name...OPPO Reno3 A Capacity...128GB