Army/Military Question.?

My boyfriend has recently left for Army active duty for infantry basic training on the first of April, he is prior service so this basic training is a lot easier but longer as well he has to go through basic for 10 weeks then 4 weeks of AIT. He was told that he qualifies for ranger training school which is 3 months, would he be able to come home after AIT first to visit his family before leaving for another 3 months or would he be going right after AIT? And while he's in training would we be able to keep contact through the telephone or letters? Anything? Please help I am so new to this.