Embattled President Yahya Jammeh of Gambia has been unreachable by phone, United Nations (UN) Secretary-General, Ban Ki-moon, has revealed. « Despite efforts to reach President Yahya Jammeh by phone, the Secretary-General has not yet been able to speak with him, » Stephane Dujarric, Ban Ki-Moon’s spokesman, said in a statement in New York. The UN chief has however…