Look at your SIM card and verify the cell phone network who issued it
Verify that you have a current cell phone service plan and compatible phone associated with that network
Call the cell phone network and ask to have your SIM card activated.
If you want to prepare 0.1M ferrous ammonium sulphateyou need to dissolve 40g of ferrous ammonium sulphate in a preveiously cooled mixture of 40ml os sulphuric acid and 200 ml of water after that dilute with sufficient boiled and cooled water to produce 1000ml
