Insert correct smart chip

I was not able to get a free NCK code for the mobile model that you have specified.You can get the NCK code for your Sony Ericsson W580i from Theunlockarena.com by specifying the country and network to which the mobile is locked to.You will receive the unlock code along with free unlock instructions.

Yes...It's Not Unlocked So that you cannot use the Sim....You need Unlock means You can get the Unlock Code at
http://www.theunlockspot.com/sony-ericsson-w580i/rs10wp9/ and Unlock the Mobile.

This may sound simplistic ... insert the correct SIM card.

Did you receive same with the phone? are you trying to use one from another phone? is one required at all? who is your carrier? What did they recommend to resolve?

Try this, since it seems you have a sim probably from another phone, there is that possibility that the formatting is not compatable with your new phone. Get a SIM to USB adapter. Plug it in to your computer USB. Copy the data from your SIM to your computer. Clear (format) the SIM using your computer. Put the clean SIM back into your phone - see what happens.

Good luck, I hope something here works for you

Thanks for posting at FixYa.com

Hi this model cannot be unlocked for free, it IS currently locked on a network provider, you can go to your local phone shop to get it unlocked.

Hope this helps

Muzzi_123

go to a company store that your phone works with and tell them you would like an unlock code so you can use the phone abroad they should help you without a problem

I was sent a Song Ericsson w580i T-mobile from my uncle from Uk and is not accepting my sim card is complaining that I should insert correct sim card, I would really appreciate if i can get a software to enable it work with my sim card.

this erroe happens because the phone may be locked 
r else the gsm may not be supporting 
indian gsm and us gsm varies a lot check the gsm

IF U ARE USING THE SAME CARRIER AS BEFORE (ATT FOR EXAMPLE) IT WONT NEED UNLOCKED. IF U WERE GIVEN A NEW SIM CARD FROM UR CARRIER WHEN THE NEW PHONE WAS BOUGHT, THEN YOU WILL HAVE TO USE THE SIM CARD. THE CARRIER ATTACHES THE SIM CARD NUMBER TO UR ACCOUNT. YOUR OLD ONE CAN BE USED ONLY TO ACCESS YOUR CONTACTS, BUT NOT TO MAKE CALLS.YOU CAN HOWEVER PUT THE OLD SIM CARD IN UR NEW PHONE FOR THE SOLE PURPOSE OF TRANSFERRING UR CONTACTS, THEN REPLACE YOUR NEW SIM CARD INTO UR NEW PHONE

try cleaning the sim card holder brass contacts or take it to a mobile service shop and have them fully service it for you to determined whatelse may need to be fix in your phone.

You need the sim card that's the same as the cell phones provider in order for it to work