Question about Fujitsu FPCM21621 LifeBook U820 5.6" Mini Notebook

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I have a laptop with built in sim card port. it is locked to AT&T. How to unlock it plse..

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  • Anonymous Mar 10, 2009

    It seems to be a Fujitsu Lifebook U820, i kinda have the same problem...

  • thebeaf May 11, 2010

    What model laptop?


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Hi, i have a dell inspiron 910 and it has a sim card slot.... but when i bought the laptop they told me it was origanly on voda now i have a 3 sim how do i get it to work in my laptop????

Posted on Jun 09, 2010

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Samsung Galaxy S2 Unlocking InstructionsWarning : Do not enter any wrong unlock codes on your Samsung Galaxy S2 mobile phones. If you enter over a certain amount of wrong unlock codes on your Samsung Galaxy S2 mobile phone, your phone may get hard locked and sometimes become unusable.
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Sim lock rest

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Sim lock code


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This is generic because I don't know the name of your carrier. I'll be using AT&T as an example. Most carriers use the same procedure but the wording may differ.

A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from your carrier. For example, if you have AT&T to unlock your SIM card, you can obtain your phone's PUK code from AT&T by:

? logging in to your my wireless Account online
? using their Technical Support Chat
? calling Customer Care at 1-800-331-0500

To get your phone's PUK code online from ATT:

? Log in to your my wireless Account.
? Select My Services under My Account.
? From the My Services screen, select My Phone/Device.
? Select Unblock SIM Card.
? The Unblock SIM screen will display your PUK code.

Once you receive your PUK code, you will need to enter it into your phone to set a new PIN code.

Note: If you enter the wrong ATT PUK code 10 times in a row, your SIM card will be invalidated, and you will need to purchase a new SIM Card. The phone will display the following error: "PUK blocked call operator."

I trust that this is helpful and solves your problem. All the best


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Open the contary lock of nokia n97

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1 Answer

When we put sim into the phone then phone shows _restriction code


GSM uses a SIM card which is different than the other authentication mechanisms. Providers (Cingular, T-Mobile, etc.) lock the phones they sell you so that you may only use their SIM cards in the device. It looks like you need to contact the company which provided the SIM card to get an unlock code. You may be able to purchases software to unlock the card from ebay.

I hope this helps!

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I followed the instructions indicated by rishikmani (and duplicated on many unlocking sites). Yes these seemingly unlocked the phone, but when I inserted a 'foreign' SIM I got the "SIM Invalid" message. I discovered that if I inserted the 'foreign' SIM and ignored the display and re-entered the unlock code, the phone reset and read data from the SIM card.

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My cellphone is ask me for puk code, where can i find that ?

A PUK (PIN Unlock Key) code is required to unlock SIM cards that have become locked following three successive incorrect PIN entries. If your SIM card becomes locked, you will need to get a PUK code from your cellular service provider to unlock your SIM card.

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1 Answer

I enter puk code rong 3 times and i get the right puk code but the sim lucked.

You only solution is to contact the Service Operator (Sim card provider), [call the customer care of your sim card provider] they will help you unlock it, probably from their system. Since it's locked means rejected, there's no other way to get it unlocked. It can only be done from the Service Provider. In most cases, rejected sim card can't be re-used, you'll need to get a new replacement from them.

Good luck.

Thanks for using FixYa.

Sep 21, 2010 | Computers & Internet

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