there are 3 cases can occure,
1- increase n location update, increase in sdcch blocking, and sdcch failures and low cssr (not phantom RACH)
2- same as above but with no sdcch blocking. (phantom RACH)
3- increase in sdcch failures with no increase in location updte or sdcch blocking at all. and ths is wieird phenomena !!!
all cases are solved by site reset or change BSIC or BCCH.
all cases may occure any time during the 24 hours.
we r fighting the ghosts of the networks :-S