If the Nokia 7210 says Code error means you entered the wrong code,It's Network Unlock code or security Unlock code?Network unlock code means you can have only 5 Unlocking tries ,if you missed means it get hard locked ,so cannot unlock using the unlock code,get the correct Unlock code from the site
Unlock-free.com/nokia/nokia-7210.html and Unlock from Network lock,You need to unlock from security or password lock means get the master reset code for Nokia 7210 at here and reset it.You can also try default code 12345 or 1234 or 0000 if not works means get the master reset code and reset it.
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