Remove the SIM card from your phone and turn it on. The phone should display "Insert SIM." Now, input the code string exactly as provided. To type the special characters: Press the quickly to create the + sign.
The unlock codes for this generation are encrypted using advanced algorithms. The code is not stored locally on the phone in a way that a simple offline calculator can guess. The Reality of "New Release" Unlock Calculators
If a calculator doesn't work for your specific Nokia 1616-2 firmware, consider these options:
This new release of the unlock code calculator utilizes an improved, efficient algorithm to generate these NCK codes for DCT4 devices, offering a high success rate. Why You Need to Unlock Your Nokia 1616-2