The newer smartphones such as the Apple iPhone 5 and 6, and Android phones, work in Turkey. — Quad-band: 850 Mhz, 900 Mhz, 1800 Mhz and 1900 Mhz four-band phones work practically anywhere in the world that GSM systems are found. In the USA and Japan, standards (CDMA, TDMA, etc.) are in use as well as GSM.