[Shaneisace]

I'm gonna assume it's the number your trying to call try this:

Код:

    if(sscanf(params, "i", number)) return SendClientMessage(playerid, COLOR_GREY, "Usage:{FFFFFF} /call [phone number]"); 
    if(number == 511) {

Since your using sscanf and assigned it as an "i" it's already an expected integer number.