iPhone XS and XS Max Have 4GB of RAM, XR Has 3GB; XS Max and XR Have Larger 3,174 and 2,942 mAH Batteries - MacRumors
Original Apple Iphone Xr Used 4g Lte Mobile Phone Unlocked 6.1" Display 3gb Ram 64gb/128gb/256gb Rom 12mp Camera Ios Cellphone - Mobile Phones - AliExpress