Hello,
I have a Dual-SIM Galaxy S4 GT-I9502 (Android version 4.2.2, baseband I9502ZNUCMF2, kernel 3.4.5-848374, build JDQ39.I9502ZNUBMG2). I have flashed, rooted, and installed Google Play.
I have two sim cards in this device, both are US AT&T cards. The first sim card slot works properly and...