Phone calls as the basis for divorce.

My husband has sent a divorce notice last week stating that i have an affair and i get calls from other guys during midnights. He doubts that i have an affair with someone before my marriage and still continuing it.. mu marriage was held in june 2013...i have been with him for only 2 months and there i was an student pursuing my btech so came to mom,s place for studies .. now suddenly he has sent an letr for divorce.. i agree i use to get cal during my exams frm my frnds but they r my frnds .. now will the court grants the divorce on this phone call basis?