You can invite your friends to use Surf and add them to Surf’s own contact list.
Additionally, you can connect your Telegram account to Surf. It 's a client-side integration that uses the Telegram Database Library. It has no connection to coin storage. It only links contacts. This authorization takes place on Telegram's servers and Surf doesn't have any intermediaries, so no information is stored on our end.
You can also add the contact list of your device to Surf contacts.
Use Settings -> Address book to configure your Surf contacts.