hi sunny,
when you increase t3212, you must also increase the t_detach timer in the VLR. Therefore the VLR takes more time to detect the “dead” ms (MS out of coverage or out of battery or turned off, etc)
In average the ratio of “dead” ms in the VLR will increase because of this. I don’t know how to explain this… it seems logical to me.
Regards
pix