Not sure which model iPhone you have?
Search them by model in the back of the iPhone

iPhone 11 Pro Max Models

A2161
A2220
A2218

iPhone 11 Pro Models

A2160
A2215
A2215

iPhone 11 Models

NA
NA
NA

iPhone XR Models

A1984
A2105
A2106

iPhone Xs Max Models

A1921
A2101
A2104

iPhone Xs Models

A1920
A2097
A2098

iPhone X Models

A1865
A1901
A1902

iPhone 8 Plus Models

A1864
A1897
A1898

iPhone 8 Models

A1863
A1905
A1906

iPhone 7 Plus Models

A1661
A1784
A1785

iPhone 7 Models

A1660
A1778
A1779

iPhone 6s Plus Models

A1634
A1687
A1699

iPhone 6s Models

A1633
A1688
A1700

iPhone 6 Plus Models

A1522
A1524
A1593

iPhone 6 Models

A1549
A1586
A1589

iPhone SE Models

A1662
A1723
A1724

iPhone 5s Models

A1457
A1518
A1530

iPhone 5c Models

A1456
A1507
A1529

iPhone 5 Models

A1428
A1429
A1428