This is a Redmi 15 with a 7000mAh battery, 8GB RAM, and 256GB ROM. It is a SIM-free device, not a carrier model. Please note that it is not 5G; it is 4G. I purchased this 4G device new because 5G wasn't available in Japan at the time. I've been using it indoors for about two weeks to test its functionality. The original screen protector felt a bit sticky, so I replaced it with a glass screen protector. I will include an unused glass screen protector as well. It's been kept in a case, so it's practically new. I haven't used the original case. It connects to docomo and au, but please be aware that it doesn't support the platinum bands, so reception may vary. I used it with a SoftBank MVNO, and it worked perfectly and comfortably. For those who find 8-inch tablets too large, this is an ideal device for watching videos. Thank you.