if the paging message is going through, then it means the MS is attached… So it probably isn’t attached, and we must assume you have seen the paging request while dreaming 🙂
Is there a cell parameter to autorize “IMSI attach” in the cells ? In Alcatel, it is called “ATTACH”.
Does it happen to only one MS, or to many MS ?
If this MS (MS 1) calls someone, does it work ? if few minutes later you try to call that MS (MS 1), can you go through ?