Technology has come to the rescue of those who hate to be out of touch. First there were beepers; now there are cellular phones. These small telephones can go anywhere with you. Anyone who may need to reach you can simply call your cellular number. Of course, the numbers for most cellular phones work only in a specific city. Some companies have formed networks with other cellular phone services in other cities to try to make numbers work for their customers no matter where they are. But customers who travel frequently to the same city have come up with their own solution - they simply get a second cellular phone number for the second city.