I have a Sony M4 Aqua Dual and also a Xiaomi RedMi 2a which was a steal at R1600 about 3 years ago. Both phones are dedicated dual sim phones, I keep the RedMi as a backup phone. In sim slot 1 is my Vodacom sim which I've had for the best of 15 years and I use it for voice ONLY. In sim slot 2 I...