Telephone

http://www.oup.com/elt/global/products/naturalenglish/elem/e_games/ne_elem_games_mobile01/
a nice game to learn mobile phrases
http://esl.about.com/library/speaking/bltelephone_vocab.htm
telephone phrases

http://www.ac-nancy-metz.fr/enseign/anglais/Henry/tel.htm
everything about telephone