R79X for iPhone 6 / 6S Plus Black AT&T/T-Mobile-Verizon Designed for use with Apple iPhone 6 Plus and 6s Plus for a secure fit and enhanced signal strength. Polycarbonate and TPE materials guard your device with military-grade drop protection. Integrated antenna works with your device's antenna to extend your LTE signal up to 3x. The antenna slides out for optimal performance. Engineered for AT&T, T-Mobile and Verizon for a strong signal and fast data speeds.