Question about LG Shine CU720 Cellular Phone

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My phone is asking for the sim card

But its my phone is asking for the sim card but its already in there..? anyone know what to do? help me please.

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If you have a friend with the same carrier as yours, try putting the SIM into their phone to see if it works. If it doesn't work, your SIM card has had it. If it does work. You may need to hard reset your phone.

Let me know how it works for you.

Posted on Sep 07, 2009

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Ouch.. this could be a problem with the phone itself and not the sim card. It's not recognizing any type of sim card meaning the pins are either dirty or there's a problem with the phone.
Is the phone new?
Was the phone dropped?
Try cleaning the contacts with Rubbing Alchohol
If not they you might need to send it in for repair

Posted on Sep 07, 2009

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Posted on Jan 02, 2017

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2 Answers

My mobile is asking for a PUK code and i don't know anyone with an idea sim how should i find the PUK code for it??


PUK code comes with your phone sim card when you bought it.Try locating where the whole box or package of your phone. Some sims comes with a manual and usually the puk code are written in there..Others comes like a regular size card and you have to detach the sim from there..in this card thee should be two Puk code that is written..
Hope that this info has help you in anyway..have a nice day..

Feb 20, 2012 | Nokia 2626 Mobile Phone

2 Answers

Locked Phon


Hi there,
You need to call your customer care number they will give you the puk code.
please vote me if i had helped.

Aug 30, 2009 | Nokia 1661 Cell Phone

1 Answer

I FORGOT MY PASSWORD PLS HELP ME .MY MOBILE IS NOKIA 5300


Relax...

The first step is to find out if the password is on your sim card.
If you already know that it is on your sim card skip this step. Turn off your phone and open it up. You should see your battery. On most phones your sim card is located under the battery. When you find your sim card remember exactly how it goes into it's slot and take it out.

Put the battery back into the phone and turn it back on. It will tell you that your sim card is missing and on most phones ask you if you want to start without a sim card. Press yes and see if it asks you for your password. If it does not, then the password is on your sim card. Put the sim card back into your phone and call your service provider. Tell them that you forget the password to turn on your phone. They should be able to tell you what you password is after they ask you a few questions.

If the password was not on your sim card, then call your cell phone provider and ask them how to reset your password.

Service provider: Verizon, Vodafone etc are service providers.
Cell phone provider: Samsung is a cell phone provider.

Please inform if your problem is solved or not. If not, then we will see what we can do.

Aug 26, 2009 | Samsung SGH-e315

2 Answers

I don't know the PUK code for my LG400 cell phone.


The puk code is a code associated to SIM card , not to the phone.

You have to choices, call the phone company or replace the SIM card inside.

The PUK code is asked if you enter a wrong pin 3 times.

You need to call the phone company that released the SIM card, they can retrieve the PUK code from a database for free.

In your case you need to contact your SIM card provider technical support to unlock the SIM.


The PIN and PUK are related to the SIM card, not to the phone.

If you replace the SIM card with a different one, then the phone will not ask for the PUK anymore.

Apr 11, 2009 | Motorola Cell Phones

2 Answers

I dont know what my PUK codes is


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The PUK code is asked if you enter a wrong pin 3 times.

You need to call the phone company that released the SIM card, they can retrieve the puk code from a database for free.

In your case you need to contact your SIM card provider technical support to unlock the SIM.


The PIN and PUK are related to the SIM card, not to the phone.

If you replace the SIM card with a different one, then the phone will not ask for the PUK anymore.

Mar 17, 2009 | LG Vu CU920 Cellular Phone

1 Answer

Puk code


If your phone is blocked. Take it to your nearest network providers outlet, to get it unblocked.

If your sim card is blocked. You can go to your network providers website,where you can download obtain the puk code that will unblock the sim card.

Nov 04, 2008 | Nokia 6111 Cellular Phone

1 Answer

Subsidy Password C261


Your default SIM CARD code is 1234

If this has already been changed and you don't have the new one,first contact the seller if possible; second buy a new SIM card if you have to;or, you can ask your provider for their help in the matter.They're usually pretty good at helping out.

Apr 10, 2008 | Motorola Mobility C261 Cellular Phone

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