Based on the results of my PriceCheck search, the Mobicel R2 8GB dual sim smartphone is available for R1,399. This seems like it would be a great option for you as it matches the specifications you asked about. It offers a good storage capacity and the ability to use two SIM cards at an affordable price point. Please let me know if you need any other details about this phone or similar alternatives in the search results. I'm afraid I don't have data on every product, but I'm happy to discuss the options I do have information on.