Now in Friend View you can search and add friends by:
user name
screen name
full name
e-mail
phone number
This works both in the mobile and Web UI. In your Account page you can choose to make your full name, verified e-mail and phone number searchable, otherwise they are not used for friend searches. Previously just user name and screen name were used in friend searches.
In the mobile client, the search is available as Options -> Search for friends, when the Friends tab is visible. You can open the Friends tab e.g. by pressing key 1. It is possible to pick a number or an e-mail from the phonebook as well (see Options in search view). To add a friend just click on the search result.
Thanks!
Friend View Team