Series 4 | Cross-Platform |

40mm and 44mm sizes replaced the original 38/42mm.

Do you need a for an existing Series 4?

Every model featured a black ceramic and sapphire crystal back for better cellular reception. 📉 The Legacy Series 4

50% louder than previous models for clearer calls and Siri. 40mm and 44mm sizes replaced the original 38/42mm

Internals were overhauled to match the ambitious new software. Series 4