Is there a way to set your IPhone so that when it receives a text from a number that begins with say 123... that it will have a different ringtone than normal? The reason I'm asking is because my FD gets sent our calls through our phones and each new call is a different random number but they always begin with the same first 3 digits. I would like to change it so that my IPhone would have a set ringtone for when it receives a message from a number that begins with the 3 digits that correspond to my fire calls. That way I could have a really loud alarm for that without having a loud alarm for all my text messages.