Nokia DCT3 UnLock
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SWITCH (or PUSH BUTTON) PIC 12C672/12CE674
_ ______ ______
/ Vcc +3,0V | \/ |
+--------O O-------------------------| 1 Vcc GND 8 |---------------------+-----o GND
+____|____ | |
|
_____ +3V or 2* +1,5V x---| 2 GP0 7 |---------------------------o Mbus
- | | |
|
(GND) | x---| 3 6 |---x
|
| | | // LED ___ |
| x---| 4 GP3 GP2 5 |-----|>|-----[___]---+
| |______________| 1K
|
|
|
|
|
+--------------------------------------------------------------------------+


Programming the PIC
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Oscillator value Internal RC (IntRC GP4)
Code Protection (CP) ON/OFF (what you like)
Watchdog timer (WDT) OFF
Power Up Timer (PWRT) ON
Master Clear Enable (MCLR) OFF
Instructions
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1. Connect the Clip to the phone (NO SIM!!, power off!)
2. Power the clip
-> LED will light
3. Switch phone ON
-> LED will go OFF
-> after 1 sec, LED will go ON
-> Clip will read info from the phone
When successfull, LED will go OFF
-> Clip will unlock the phone, and does a factory reset
-> Phone will reboot
-> LED will blink fast
UNLOCK process is finished, next step will be IMEI change process.
Release push button or deattach clip from the phone if you don't want to
change the IMEI.
-> LED should stay ON for 1 sec.
-> Clip will read some info from phone
When successful, LED will go OFF
-> After 1 sec, LED will go ON again
-> after about 2 secs, LED will BLINK
-> Phone will be rebooted
IMEI will be changed