Problem regarding mobile sim card chang

Hi is your samsung c3530 mobile is asking for sim lock code once you insert your sim in it then it mean the phone is locked to some other network provider due to this it wont accept any other GSM sim until you unlock it ..You can easily unlock your phone through online providers like MobileUnlockSolutions.com here they are rendering sim unlock code for all mobile models at reliable cost .You first check that whether the code is available for your country and network provider .If yes then pay for it and unlock the phone then freely use it with any GSM sim ....

Try this one:
#7465625*638*NCK/Network#

check out this link on how to unlock your locked sim card. How to Unlock Locked SIM Card Manually eHow

Hi. you can get the network unlock code for a Samsung E2550 from Mobile-Unlocker.com at affordable cost.

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..........UNLOCKING INSTRUCTIONS..........
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Method 1:
1 - Switch ON your Samsung E2550 Monte Slider with a NOT ACCEPTED SIM Card.
2 - Samsung E2550 Monte Slider will ask for "Password".
3 - Enter the Unlock Code.

OR (if the Samsung E2550 Monte Slider shows "Insert Correct SIM Card")

Method 2:
1 - Switch ON your Samsung E2550 Monte Slider with a NOT ACCEPTED SIM Card.
2 - Don't bother about what's being displayed on your Samsung E2550 Monte Slider.
3 - Compose : #0111*CODE#.

MY SAMSUNG GT-1175T MOBILE SIM CONNECTION DAMAGE

entering 00000000 is for phone lock code

network lock means need to openline or unlock network provider...

go to the nearest mobile center...

the default lock code is 00000000 i.e eight zeros! bt if u have changed it then u have to go to the samsung service.please rate me

hi karen
my samsung phone is unlock insert sim sos.how to unlock the phone sgh-e250

Its not asking for phone password ,as you told that you have access to phone with old sim but not with new one,so its definitely asking for PUK code which you can get from calling the customer care of new sim card.......

If still it is asking for security password then let me know and reply with your IMEI no of your mobile by inserting the old sim card and then type *#06# at the screen,you will come to know your IMEI no.

Regard

Dilip

Please follow the instructions carefully! Following are the 12-point instructions to unlock your Samsung E250 phone:
1. First do a CUSTOM RESET by tying in:
*2767*2878#
(Phone may display foreign language – don't worry! The last digits after the * will appear as - - - -; this is normal)
2. Turn off your phone
3. Take the battery and SIM out of the phone
4. Take a wrong network SIM (a SIM the phone does not currently accept) and insert it ONLY HALF way in, so when you turn on the phone it won't detect the SIM. Very important so the phone won't ask for network password and will show "Insert SIM" message.
The process of inserting only half of the SIM. I advice you to take care and do it with a soft approach as you might not have done this before.

5. 2. Now put the battery in carfully behind the protruding SIM card and switch the phone on. The phone must show "Insert SIM" message.
6. 3. Without turning off the phone, now push the SIM card all the way in, at this stage the phone must continue to display the "Insert SIM" message with the WRONG SIM inside.
7. Now make a FULL RESET by typing: *2767*3855#

9. Change the NCK password to 8 zeros by typing: *7465625*638*00000000*00000000#
8. The phone should reboot working with "wrong" SIM inside. (Do not turn off the phone)
10. Disable network lock by typing: #7465625*638*00000000#
12. Check this is done with *#7465625#
If your phone is not unlocked please retry the above ensuring all steps are followed to the letter, 9 out of 10 people who have problems have made a simple error and find that when they repeat all the steps it works.