Yes there are various brands that are providing the phone with 3 sim cards for an example, LG A290 Triple SIM Phone is a very good bar phone or key pad phone. With a very good battery back up I am sure this would be a good phone for you. However, there are more of other brands that have manufactured the 3 sim card supporting models like Yezz Triple SIM Phone – Fashion 10 and Acer Liquid E700. These also are good phones supporting 3 sim cards and you should be able to buy them online through amazon as well.
Hope it helped for what you were searching for.
