[Twizted]

I'm releasing a cellphone system and I've introduced radio towers for the same purpose. Towers have a certain range, and if you're not in the range, the signal will be low. However, I'm not quite sure how I could replace the message the player types with dots and hyphens, for example:

Hey ma.. c.. you hea.. me? Lo.. where I liv...

Could anyone give me a practical example on how to perform this and what functions to use?