15th April 2007 at 15:42
#46904
paraHO
Guest
I shall have another go…
Having worked in handset manufacturing in the past causes for IMSI-detach:
1) power off handset
2) SIM removed from handset
3) SIM loose (causes make/break) when inserted into handset
4) Where handset in GPRS modes and switches to IMSI-detach to select non-GPRS services
(part 1)