iPhone 3G "No SIM card installed." Problem Solved

After waiting for 4 hours at my local Apple store, I finally got my iPhone. Like everyone else, I was so excited and hurried home. When I got home, I started to play around with it. When I handled the iPhone, I noticed that the bottom felt hot. Without taking much notice of it, I continued to set it up and try all sorts of interesting things that can be done using this phone.

Then, suddenly the message “No SIM card installed.” popped up, and the phone function stopped working. A simple Google search found this thread, which is extremely helpful. People suggested taking the phone back to AT&T store and getting the SIM card replaced. However, it was late, and the store was closed, so I decided to try out some of the other suggestions to reset the settings.

First, I tried reset the Network settings. This is what I did:

  1. From the main screen, tap Settings.
  2. Tap General.
  3. Scroll down and tap Reset.
  4. Tap Reset Network Settings.

After resetting Network Settings, my phone wass still not working. I then tried to reset all settings.

  1. From the main screen, tap Settings.
  2. Tap General.
  3. Scroll down and tap Reset.
  4. Tap Reset All Settings.

To my disappointment, it still didn’t work. Before I called it a day, I reset the network settings again, and it started to work again.

I don’t know if the problem will come back or not. Hopefully, this will fix the problem permanently.

[Update: 7/13/2008]

The dreaded “No SIM card installed” message came back tonight. I took out the SIM card and reseated it several times. I also reset all settings several times again. It is now working again. I think that I still have to eventually get the SIM card replaced at the AT&T store.

[Update: 7/15/2008]

How can you live a day without the SIM card problem?! I experienced the problem again yesterday morning. I noticed a pattern. The problem always occurred right after I took it out of my pocket, and I usually place the iPhone in my pocket upside down. I think the SIM card tends to come loose when the iPhone is upside down.

I have thus changed the way I put the iPhone in my pocket, and I have yet to come across the same problem since yesterday morning. I’ll keep my fingers crossed.

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