Check the warranty status of your phone.
Go to a Nokia Care Point for face-to-face support
Enter *#0000# on your phone’s keypad. The display shows your phone’s model and product code.
On older phones, these numbers are printed on a white label in the battery compartment, underneath the battery.
Yes, you can. Select Menu > Contacts (or Contacts > More) > Copy (or Copy Contacts) > From SIM1 to SIM2 or From SIM2 to SIM1.