It can Take awhile, if they miss th intial call (maybe cause things were running behind or phone card didn't work, etc). They have to earn the privalge, took my boy three and half weeks in and passing an inspection before we got a call other than the I'm here at Great Lakes.
Hang in there.
He will do fine, my son graduated on August the 7th and is now in MA school at lackland. It will be diffcult loosing touch for awhile, write plenty of letters and tell him how proud you are. My son said my letters kept him going in rough times. He said Dad when I jumped off the swim board you were with me all the way. Also I spent a great deal on you tube watching the basic training videos, it really helped me understand. There is no better feeling to see him enter the drill hall on Grad. Day. I consider myself a tough guy, but I cried like a baby....smile
I hope this helps.
Do they have mail call every day or once or twice a week? How often can they write to us?