During the yesterday's conversation, Cameroon also briefed Obama on the recently held tri-lateral dialogue with leaders of Afghanistan and Pakistan, the White House said.
"On Iran, the President and Prime Minister reiterated their support for the P5+1's unified proposal and discussed their expectations for the next round of talks," it said.
"The two leaders reviewed the situation in Afghanistan, including the status of the US-Afghanistan Bilateral Security Agreement," the White House said.
"The two leaders expressed their continuing support for the Geneva II conference, and they welcomed the decision by the Syrian National Coalition to attend. The two leaders also reviewed progress on eliminating Syria's chemical weapons," it said.
"The United States values its special relationship and alliance with the United Kingdom, and the two leaders will continue to consult on important security matters affecting both our countries, and the world," the White House said.