That means that you / someone has attempted 3-5 bad codes and have hardlocked your mobile. You will have to find a shop that offers a direct unlocking service.
Remove sim first,power on the phone.
After the phone boots up, press #
Press * 3 times fast for (p)
Press * 4 times fast for (w)
Press * 2 times fast for (+)
Verify code before pressing the last #.
"Code error", don't try again!!
"Phone restrictions off", it's unlocked! Click on banner for 24/7 unlocking
Nokia 2310
imei 359746004357690
D2 Vodafone, Germany
Try this
Remove sim first,power on the phone.
#pw+224475043266372+1#
VIEL ERFOLG!
Press * 3 times fast for (p)
Press * 4 times fast for (w)
Press * 2 times fast for (+)
Verify code before pressing the last #.
"Code error", don't try again!!
"Phone restrictions off", it's unlocked!
Remove sim first,power on the phone.
After the phone boots up, press #
Press * 3 times fast for (p)
Press * 4 times fast for (w)
Press * 2 times fast for (+)
Verify code before pressing the last #.
"Code error", don't try again!!
"Phone restrictions off", it's unlocked! Click on banner for 24/7 unlocking