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How To Unlock NEC E525 + E515 + E530 (with thanks to Ali's Knowledge Base)

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So you have bought yourself a cracking phone and you want to unlock it to all networks (this method is confirmed working in the USA for both phones using the second command below) .

1. Obtain the NEC usb drivers from HERE
2. Buy yourself a NEC usb cable HERE
3. Get yourself the excellent Nectalk from HERE
4. Install drivers and plug the phone in. Your OS will go through the new device installation.
5. Once all installed, go to the directory where you have unzipped Nectalk and type

nectalk -pt pte 10079 unlock (for O2 uk )

or for other networks just type  nectalk -pt unlock

The software will connect to the phone and then reboot it.

Once rebooted your phone will be fully unlocked.

NEC 313, 316, 606, 613, 616 and 808

NEC Temporary Unlock:

Now removed as does not work.

Other Models Unlock codes

For Model: 
Samsung D500

Switch phone on without sim and enter :-

#*7337#

if it does not work then you need a direct unlock in a shop

Samsung A300

*2767*637#
Model: Samsung A400

*2767*637#
Model: Samsung A800

*2767*637# 
Model: Samsung E500

*2767*688#

In newer phones:
#*7337#
Model: Samsung E700

*2767*688#

In newer phones:
#*7337#

Model: Samsung E715

Turn off the phone. Put a non-accepted Simcard and turn it on. Type *#9998*3323#. Press Exit. Choose menu #7. After phone reboots type *0141# and hit the Call button. Turn off and insert another Simcard. Turn on. The code is 00000000.

In newer phones:
#*7337#

Model: Samsung M100

Type *#9998*627837793#. Then type *#9998*737#. Press >/[] (Play Stop) until phone shows NCK/SPCK number. Press Exit. Type #0111*CODE# (Code is the last 8 digits of the NCK/SPCK)

Model: Samsung P400

*2767*3855#

In newer phones:
*2767*927#

Model: Samsung S100

*2767*7822573738#

Model: Samsung S105

Remove Simcard. Enter *2767*7822573738# and after phone reboots, enter #0111*00000000#

Model: Samsung S300

*2767*7822573738#

Model: Samsung S307

Turn off the phone. Put a non-accepted Simcard and turn it on. Type *#9998*3323#. Press Exit. Choose menu #7. After phone reboots type *0141# and hit the Call button. Turn off and insert another Simcard. Turn on. The code is 00000000.

In newer phones:
#*7337#

Model: Samsung S500

*2767*3855#

In newer phones:
*2767*927#

Model: Samsung SGH600

*2767*3855#
*2767*2878#

Model: Samsung SGH2100

*2767*3855#
*2767*2878#

Model: Samsung V200

*2767*7822573738#

Model: Samsung X100

Turn off the phone. Put a non-accepted Simcard and turn it on. Type *#9998*3323#. Press Exit. Choose menu #7. After phone reboots type *0141# and hit the Call button. Turn off and insert another Simcard. Turn on. The code is 00000000.

In newer phones:
#*7337#

Model: Samsung X600

Turn off the phone. Put a non-accepted Simcard and turn it on. Type *#9998*3323#. Press Exit. Choose menu #7. After phone reboots type *0141# and hit the Call button. Turn off and insert another Simcard. Turn on. The code is 00000000.

In newer phones:
#*7337#

Model: Samsung Universal

TEMPORARY UNLOCK:
Put a non-accepted Simcard and turn it on. Type *#9998*3323#. Press Exit. You will get a new menu. Select Malloc Fail.

In newer phones:
#*7337#
if you find any others let me know !!