Question about Sony Ericsson P990i Cellular Phone

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SIM card from old phone won't work in new phone

The SIM card from my old Cingular phone won't work when I insert it into my Sony Ericsson P990i. The Sony phone is unlocked. Do I need a special kind of SIM card? I am not very technical so this may be a silly question.

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Re: SIM card from old phone won't work in new phone

How old is your current SIM-card ? There was a change in operating-voltage on the SIM-cards and its a known issue that the P990i wont accept "older" cards. Contact your provider and get a newer card. You could perhaps try one of your friends SIM-cards in your phone, before ordering a new one, if the card is newer than the one you have.

Posted on Oct 05, 2007

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may be your sim card is very old
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My sony ericson p990i the problem insert sim how to solve it,,???


This Problem can be caused if the Sim slot in the phone is not tight enough.

Try removing the Sim card and replace it ensure you press very hard to make it stay in place so that the chip on the Sim card touches the Sim card panel on your phone.

If this does not work then the Sim holder is faulty and it needs to be replaced and you wont experience the problem anymore


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Unlock code for my p990i

If you want to unlock the Sony to use it with a different phone provider then this may help you.
When you place a new or a existing SIM card from another phone provider into your mobile phone and it asks for a Security code then :-
This phone is locked to the original mobile phone provider. You need to contact this mobile provider to ask for the unlock code (security code) for this phone. You need to provide proof of ownership etc and the phone's unique IMEI number which is located inside the phone under the battery. They use this number to generate the unlock code for your phone.
They should provide you with instructions on how to enter this code into the phone.
Once you unlock the phone, then you can insert a new SIM card in this phone or sign up with another phone provider using this phone.

You could ring the phone provider and ask for the unlock security code because you are going overseas and wish to use your phone with a prepaid SIM card from another country. This maybe a free service.
The other way to get your phone unlock is to use a phone unlocking company on the Internet, they usually charge a couple of Dollars for their services. Use Google and search for "Security unlocking code” companies in your area.
You can also try this WEB site :-

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We have the exact same problem and our SIM card starts with 8931. Do you think it will work for us??

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