Anyone tried one of these dual sim adapters for Phones that only have one SIM slot?
http://www.magic-sim.com.au/product/id/36/MAGICSIM_ELITE_-_iPHONE_6_DUAL_SIM_ADAPTER.html
The product blurb makes it sound like you have to manually switch, selecting which SIM is active at any one time. So you couldn't be available to take calls on both numbers at the same time.