I'm using karbonn A15, which runs on ICS. while sending sms, when both of its sim are enabled, the message are sent through sim1 and i've to face sms charges. As i want to send messages from sim 2 only. Then how to set sim 2 as default sim for messaging? Previous android gingerbread has the option to set different SIM cards for different tasks. e.g. SIM 1 for data and SIM 2 for sms etc. help.