iPhone 6'da 4.5G desteği mevcuttur. Ek olarak desteklenen frekanslar ve hızla şu şekilde:
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| 4G bantları | LTE bant 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 29(700) - A1549 GSM, A1549 CDMA |
| LTE bant 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 29(700), 38(2600), 39(1900), 40(2300), 41(2500) - A1586 | |
| Hız | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps, EV-DO Rev.A 3.1 Mbps |
