Register a Handle to set up your profile with the email addresses and phone numbers you want friends / colleagues to use.
Then simply give out your Handle and everyone will be able to connect with you by simply knowing your Handle.
If you move jobs / college or just wish to change email addresses or phone numbers simply delete your old details and add your new ones to be instantly updated.
If you change jobs, no problem - just replace your old email with your new one and youre instantly updated.
If you want to change phone numbers - just enter your new one and its immediately live.
Give out your Handle to people youve just met and they can just Dial / Email / SMS your Handle and get routed to the one or more Email addresses / Phone numbers you have specified.