This mobile phone met all my expectations: dual SIM*, wi-fi hot spot, clear large screen, excellent camera and easy to use.
The 2nd slot is for memory card or 2nd SIM. There is 16 GB storage so there is enough onboard memory so that the 2nd slot can be used for 2nd SIM. If you want more than 16 GB memory, than you will have to use the 2nd slot for memory card instead of SIM card. I am very happy with this purchase.