To identify which iPhone model you have, look for model number on the back cover:
iPhone 6:
• Model A1549
• Model A1586
• Model A1589
iPhone 6 Plus:
• Model A1522
• Model A1524
• Model A1593
iPhone 5s:
• A1453
• A1457
• A1518
• A1528
• A1530
• A1533
iPhone 5c:
• A1456
• A1507
• A1516
• A1529
• A1532
iPhone 5:
• A1428
• A1429
• A1442
iPhone 4s:
• A1431
• A1387
• A1387
iPhone 4:
• A1332
• A1349