If you own a cell phone, why not program it so that when your sweetie calls you from their cellphone, your phone sings a different tune from when the rest of the world calls you?! Browse your phone’s features for a tune you like. If you don’t find one you like, try downloading one, many are free of charge. Bonus: Use a tune that has special meaning for the two of you. P.S. Always answer when your sweetie calls you!