I was doing some online reading about cellphones over the weekend. One thing I noticed that was new to me was that there are phones that have two sim slots. Most of the phones that have this capability seem to short cut the memory expansion card process by making the second sim slot an either/or sim or memory expansion. However there seemed to be a few phones that offered both 2 sim slots plus a memory expansion slot. So just curious, do business people, such as insurance agents, that use a cell phone a lot find an advantage in a dual sim phone that let them have their personal number and business number in a single phone (or probably more expensive in terms of plans, but having business numbers on two separate networks for better phone access when travelling)?