The silence since November 13th is most likely the result of the transfer process itself rather than anything more concerning, and understanding what happens during that transition helps explain the gap.
When an inmate transfers from a county jail to a state or federal facility, they go through an Admission and Orientation process before most privileges are reinstated. Phone access and visitation are typically suspended during that period while the facility processes the new arrival, assigns housing, completes medical and classification evaluations, and conducts orientation. That process generally takes about a week, though transfers that involved multiple stops along the way can extend that timeline.
The good news is that letter writing is not restricted during this period in the same way phone and visitation are. Your boyfriend can write outgoing letters from the moment he is settled enough to put pen to paper, even before orientation concludes. The limitation is that he needs writing materials, a stamp, and your address to do so.
From your end, sending a letter through InmateAid now is one of the most useful things you can do. Mail moves independently of the orientation restrictions, which means a letter sent today can reach him while he is still going through the process. Having something from you arrive in those first days at a new facility is genuinely grounding during what is a disorienting transition.
Once orientation wraps up and phone access is restored, expect his call. Make sure your number is on his approved list at the new facility and that there are funds on his phone account so nothing delays that first connection.