Archived:Certain PIM API operations cause error in Nokia 6270 and Nokia 6230i (Known Issue)
The PIM API implementation in the Nokia 6270 and the Nokia 6230i makes the phone auto-reboot if lots of contacts are added automatically to the Phonebook.
How to reproduce
If you add 100 contacts from the MIDlet to the Contact list, this results in an auto reboot on the Nokia 6270 and the Nokia 6230i.
Upgrade the software.