Released October 26, 2018. Models A1984, A2105, A2106, A2108. Available as GSM or CDMA / eSIM, nano-SIM or dual-SIM / 64, 128, or 256 GB / Black, White, Blue, Yellow, Coral, or Red. (Pronounced "iPhone 10 R.")
It sounds like someone has it locked via iCloud, did you buy this used? if so you need to contact the seller to unlink his iCloud account or return it and get your money back as it was likely stollen!