You can easily Find your iPhone Model number by looking at the small text on the back of the iPhone.
You might need to use a magnifying glass or use another smartphone and take a photo of the back of your iPhone and enlarge it by using pinch to zoom.

There will see something like  “Model AXXXX“.

Match it to the list below to find out which iPhone model you have.

• A2218 –  11 Pro Max (2019)
• A2215 –  11 Pro (2019)
• A2221 –  11 (2019)
• A1921 –  Xs Max (2018)
• A2101 – Xs Max (2018)
• A1920 – Xs (2018)
• A2097 – Xs (2018)
• A1984 – Xr (2018)
• A1865 – X (2017)A1865
• A1901 – X (2017)
• A1864 – 8 Plus (2017)
• A1897 – 8 Plus (2017)
• A1863 – 8 (2017)
• A1905 – 8 (2017)
• A1661 – 7 Plus (2016)
• A1784 – 7 Plus (2016)
• A1785 – 7 Plus (2016)
• A1786 – 7 Plus (2016)
• A1660 – 7 (2016)
• A1778 – 7 (2016)
• A1779 – 7 (2016)
• A1780 – 7 (2016)
• A1662 – SE (2016)
• A1723 – SE (2016)
• A1724 – SE (2016)
• A1634 – 6S Plus (2015)
• A1687 – 6S Plus (2015)
• A1690 – 6S Plus (2015)
  A1699 – 6S Plus (2015)
• A1633 – 6S (2015)
• A1688 – 6S (2015)
• A1691 –  6S (2015)
• A1700 – 6S (2015)
• A1522 – 6 Plus (2014)
• A1524 –  6 Plus (2014)
• A1593 – 6 Plus (2014)
• A1549 – 6 (2014)
• A1586 – 6 (2014)
• A1589 – 6 (2014)