Normally during basic, they will be able to earn phone privileges. But it could be a few weeks before he is able to call you again. You should receive a standardized letter soon from his commmand that includes his address. When my husband was at Benning, I usually heard from him on average of about once every two weeks - sometimes it was three weeks and sometimes I got lucky and heard from him two weekends in a row!
Is he infantry? If so, he will have a family day or mid-cycle pass at the end of nine weeks. Beyond that, you will not be able to see him until turning blue and graduation day. Again, this assumes he is infantry.
Hope this helps! :-)