Remember that even if you successfully unlock a DCT4 phone, many countries have shut down or are actively phasing out legacy 2G and 3G networks. Ensure your modern carrier still supports GSM frequencies in your region before investing time into unlocking.
The is widely regarded by technicians and enthusiasts as the most reliable and accurate DCT4 calculator.
Power on the phone with any SIM (even a blocked one). Dial *#06# . Write down the 15-digit number.
: Usually, the calculator provides multiple codes (1 through 7). Code 7 is the master code that typically removes all locks. Limitations and Warnings Nokia DCT4/DCT3/DCT2 Unlocking Codes by Crux Calc
✅ – Enter *#0000# on the phone. If version is V 05.50 or similar (not BB5), it's DCT4.
