I looking to dowload skipe in my phone lg u 990 i have sim card 3g but i can finde anything=[

That extra port you found is for adding a MEMORY expansion card....not a sim card. Your phone may not have a removable sim card.

Your SD slot is for a memory card and putting a sim card into it will not solve anything. Call your mobile carrier and check with them regarding the sim card. Maybe your phone doesn't take a sim card. Go to LG.com and in the search area list LG Optimus user's manual and that should answer your questions. I looked on that web site for my LG user's manual, found it and downloaded it I WOULD LIKE TO MENTION TO THOSE OF US THAT CANNOT FIND A MICRO SIM CARD FOR OUR PHONES UNLESS YOU WANT TO PAY +$70.00 ON AMAZON. TAKE YOUR REGULAR SIZED SIM CARD TO A LOCAL CELL PHONE STORE AND ASK THEM IF THEY HAVE A SIM CARD CUTTER. IF THEY DO, THEY WILL PROBABLY CUT YOUR SIM TO A MICRO OR NANO SIM FOR FREE. IT WORKED FOR ME.

Model : LG KU990 Viewty & KE990

1. insert original sim card and turn phone on.
2. Press telephone icon at bottom of screen to bring up the phone keypad
3. Enter 2945#*990#
4. A menu will pop up, select sim unlock
5. Enter your unlock code and press ok
6. The phone will then reboot and the unlock is complete.

unlock phones are so unperdictable...there may not be a fix for this issue..other then getting an AT&T phone....and even if u are able to get it to start working again more then likely u wil continue to have many more isses..mainly becuz of the network changes..for example....using 3g and 3g only...last year the AT&T network was stil using both 2 and 3g network and there was even a few 2g SIM cards being sold in stores...now it almost all 3g..which of course complicates many things...even if u own a 2g AT&T phone a 3g SIM card can be and will be used on that phone....with unlock phones running on the 2g network the issues with not having a SIM card where possible...it was still unstable when wanting to use data services....but voice services were possible...now with everything going 3g...its makes things alot more complicated with AT&T if using a phone without SIM cards...if ur phone has the fuction to beable to shut off 3g networking and run on 2g.(like the apple iphone has) then try that....good luck

Hi,

The Procedure is explained below :-

http://www.ehow.com/how_5458592_activate-att-sim-card.html

Let me know, if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Causes:
~Sim Card Not properly Inserted
~Sim Card has Expired(in some countries sim card expires)
~The area where you Insert the sim card maybe damaged

Solution
~Remove sim card and Insert it again
~Buy new Sim Card
~If your still under warranty bring it to the nearest LG center, if not look for a certified cell repair shop

Sorry, i've just figured it out, that the problem might be because you're using 3G card, if it uses 3G not only for internet but also for calls and messages. I think that's why your phone does not accept your card.

if the SIM is secured properyl (not backward or anything) then there must be a hardware problem and you will need to get LG to repair it

You may need to get a newer SIM card the Shine is 3G and some 3G phones don't like none 3G SIMs

The LG CU500 is a 3G phone I think. You may need to change your SIM CARD to 3G. I had a razor and my Sim didn't work with the LG CU320 I bought. Also unlocking a LG phone is a little more troublesome that other phones. I found a solution on the web. sorry I don't remember the website address, but it comes up in any google search. Hope this helps.

Good luck