For those who are reading this and wondering what these idiots are talking about, here are the detailed steps:
1. You can edit the STD code field. So where you see your STD code like 40, 80, 22 etc, place your cursor there, select both numbers and type the first two numbers of your Mobile number. Ex: if your mobile number is 98XXXXXXXX, you must type 98 in the std code field
2. In the empty box next to the box where you entered 98 (as per above example), enter the remaining 8 digits of your mobile number. In the above example instead of XXXXXXXX, if you assume the remaining 8 digits to be 76543210, it will look like:
box1 box2
98 76543210