Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 16 or 32 GB capacity / black or white plastic back.

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What part of the phone controls service and reception?

I have an Apple iPhone 3GS. I gave it to a friend to switch the housing and I do not know ehere he went wrong but when i recieved the phone back I could not get even get one bar of service or reach the internet with my SIM card. Everything works perfectly fine on the phone, except the phone and service itself. Screen, speakers, apps, speed all there but no phone calls or internet. Any clue what piece inside the phone would need to be replaced so I could get it to be more than an ipod again?

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Part of dock connector has antenna on it. connector 7.Does it recognize sim as could also be sim needs cleaning or prongs in sim tray are flattened. Also check small gold antenna thhat connects to metal bezel is making good contact (near connector 7 and "do not remove"(warranty) sticker)... This is most likely error when replacing motherboard in case

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Why did you say don't remove the sticker?

Update

The reason I ask, is because I have taken apart a few iphone 3GS now...and every time I put them together I get less reception. I put all the screws back exactly where they go, I wear gloves... I make sure the connector near the dock is touching... I just can't figure it why I am losing reception...

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I think its the "do not remove" sticker :-) It has it printed on there ;-)

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Charles, it might work better for you if you ask your own question. Click on the link on the right side of this page "ask a question" and give as much detail as possible. This way the experts will see that you are asking a question and not answering an old question that has been competed. Good Luck

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oldturkey is right.. i mean the "do not remove" sticker, not do not remove the sticker! you may find that the way you are lifting your board out of the case is flexing/stressing the trace filaments inside the board. I've had plenty of repair jobs where signal is lost or lower where this is the case... that wing with the antenna connection on it takes a little bit of manoeuvring to get out and sometimes either the gold "wing" or the trace are damaged.

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