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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Message says "no Sim" although there it is in, and checked?

I used the phone in the morning, switched it off in my workshop, and on switching it on at lunchtime to check messages, it said there was no sim installed. I had not touched the sim!! on returning home, I used the sim removal tool and replaced the sim - several times - but no change to the message. Any ideas?

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hope you have tryed rebooting,try booting up whith no sim card installed and then put it in. if that didn't help, resetting some settings might, make a backup first (from settings->general->reset->Reset network settings).

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I don't know if it will work but let's try anyway: put a little piece of paper between the iPhone SIM tray and your SIM card.

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I have been having problems with a "No SIM card installed" message on and off for weeks. I saw a video on YouTube http://www.youtube.com/watch?v=tdE6zGTsF... That got me going in the right direction.

I took the iPhone apart again and took a guess at a little metal bar that gets pushed down when I install the SIM card and it looked like it wasn't going down far enough. So I cut a tiny piece of thin cardboard from a tea box and inserted it between the sim card holder and that metal bar so when the sim card holder was inserted, it pushed the metal lever down far enough so it wasn't touching the metal connector. I put it back together and its working perfectly! Woohoo! What a world. The cardboard fix!

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Anne will be eternally grateful.
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