A:AnswerHere are the frequency bands for the Samsung Galaxy S6: 2G GSM:GSM850,GSM900, 3G UMTS: B1(2100), B2(1900), B4(AWS), B5(850), 4G FDD LTE: B1(2100), B2(1900),B3(1800),B4 (AWS),B5(850),B7(2600),B12(700),B17(700),B20(800).
A:AnswerThank you for your question, Bob. This device comes with Android 5.1 Lollipop. However it should be capable of getting updates including Marshmallow. I hope that helped to answer your question. ^Viv