Year introduced: 2015
Capacity: 16, 64, 128 GB
Colors: Space gray, silver, gold, rose gold
Model number on the back cover: A1633, A1688, A1700
Details: The display is 4.7 inches (diagonal). The glass front is flat with curved edges. The back is anodized aluminum with a laser-etched "S". The Sleep/Wake button is on the right side of the device. The Home button has Touch ID. There's a True Tone LED flash on the back and a SIM tray on the right side that holds a "fourth form factor" (4FF) nano-SIM card. The IMEI is etched on the SIM tray.
iPhone 6s Plus (5.5" Screen):
Year introduced: 2015
Capacity: 16, 64, 128 GB
Colors: Space gray, silver, gold, rose gold
Model number on the back cover: A1634, A1687, A1699
Details: The display is 5.5 inches (diagonal). The front is flat with curved edges and is made of glass. The back is anodized aluminum with a laser-etched "S". The Sleep/Wake button is on the right side of the device. The Home button has Touch ID. There's a True Tone LED flash on the back and a SIM tray on the right side that holds a "fourth form factor" (4FF) nano-SIM card. The IMEI is etched on the SIM tray.
iPhone 6:
Year introduced: 2014
Capacity: 16, 32, 64, 128 GB
Colors: Space gray, silver, gold
Model number on the back cover: A1549, A1586, A1589
Details: The display is 4.7 inches (diagonal). The front is flat with curved edges and is made of glass. The back is anodized aluminum. The Sleep/Wake button is on the right side of the device. The Home button has Touch ID. There's a True Tone LED flash on the back and a SIM tray on the right side that holds a "fourth form factor" (4FF) or nano-SIM card. The IMEI is etched on the back cover.
iPhone 6 Plus (5.5" Screen):
Year introduced: 2014
Capacity: 16, 64, 128 GB
Colors: Space gray, silver, gold
Model number on the back cover: A1522, A1524, A1593
Details: The display is 5.5 inches (diagonal). The front has curved edges and is made of glass. The back is anodized aluminum. The Sleep/Wake button is on the right side of the device. The Home button has Touch ID. There's a True Tone LED flash on the back and a SIM tray on the right side that holds a "fourth form factor" (4FF) or nano-SIM card. The IMEI is etched on the back cover.
Find out your iPhone model. (You can find the model # on the back side):