My 8310 is running on 4.5.0.55 OS , there's an option to tranfer contacts from my SIM card to the phone but is there a way to save contacts on phone to SIM card ?
AFAIK you have to go into address book, highlight the number field you want to copy to sim, press menu key, and hit copy to sim phone book. I wish there were a way to copy more than one contact at a time, but that's how you do it..