Thanks Travelsim, anyway I suggest you to work also on the unique number for calls and SMS since it's something which can confuse a lot people receiving calls and SMS from Travelsim numbers. Of course we know that there are the 2 numbers, but apart from us, "normal people" don't and get confused.

for me as for TS user 2 numbers not a big problem, because when I send SMS recipient see my SMS number and can reply me,

when I call, recipient see my voice number, and can call back to me.

Whyle nobody not confused ;)