Apple iPhone 3G - How to replace the sim card

I have an Apple iPhone 3G which was under AT&T and when I terminated and unlocked, I switched to Straight Talk's program - Bring your own Phone.  ST has sent me a replacement sim card, but I do not know how to replace it.  I removed the old sim card which was sitting on a cradle, but the new sim card I got just came with the metal piece only, not stuck to a card like, where I stick on to the cradle and then insert it into the iPhone.  I tried to research on youtube.com but all the vides show just how to remove the cradle with the sim card from the phone.  But it does not show how to replace the metal piece new sim  onto the card slot.  Does anyone know of any videos that show how to do this.  thank u.
jegajothyretiredAsked:
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Leslie BloomCorporate & Product Marketing ManagerCommented:
I believe I know what you are talking about, but can you attach a photo of the 'metal piece new sim' that you mentioned here?

iFixit has a simple guide for this - https://www.ifixit.com/Guide/iPhone+3G+SIM+Card+Replacement/573

They also sell the SIM card tray if you need it - https://www.ifixit.com/Store/iPhone/iPhone-3G-and-3GS-SIM-Tray/IF137-003-1

From your description, it sounds like you might have only received the metal SIM card tray and not the SIM card itself...
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jegajothyretiredAuthor Commented:
In response to leslie, Yes, I only received the metam SIM card which is a bronze color, a tiny piece of about 0.5", and it did not come already fixed to the cardboard, like what I have already in my iPhone.
Thank u.
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Leslie BloomCorporate & Product Marketing ManagerCommented:
You should be able to easily remove the old SIM card from the tray, and insert the new one you received.

In addition to the image below, this iFixit guide helps show how easy this is!

Here's a quick video tutorial to help guide you through it as well: https://www.youtube.com/watch?v=gqxHO0XfrOA

insert-sim-iphone3gs.png
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jegajothyretiredAuthor Commented:
in response to Leslie, I was able to remove the cradle with the old SIM metal piece that was affixed to a thick board.
the problem is now, how do I remove the old metal bronze SIM and replace it with the new replacement piece without damaging anything.  Attached is a scanned of the objects.
In your responses' links u provided, I do not see anywhere it shows how to replace the original SIM bronze piece that is affixed to board, with the new replacement SIM piece.
Thank u.
sim-card-and-cradle.jpg
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Eoin OSullivanConsultantCommented:
The new SIM card is NOT compatible with your iPhone 3GS .. that new SIM card is designed for latest iPhone 5s and iPhone 6 and similar phones.

You'll have to contact Straight Talk and get them to issue you an older format of SIM card
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Leslie BloomCorporate & Product Marketing ManagerCommented:
@eoinosullivan is correct. Straight Talk should be able to help correct this for you.
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jegajothyretiredAuthor Commented:
Your graphics tickled my mind to realize that the vendor sent me the wrong SIM for my phone, and was verified by a retail outlet.  Thank u.
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Leslie BloomCorporate & Product Marketing ManagerCommented:
@jegajothy - Happy to help. Hope you can get the correct SIM card for the phone!
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jegajothyretiredAuthor Commented:
In response to Leslie, Yes, I managed to see their error, and reinforced it by saying that their retail outlet confirmed it so.   Thank u again for your inputs.  Gracias.
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