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Re: iphone 3h no service
Well first of, there is your warranty, but if your Apple store rejects it for some reason, there is both an iPhone Repair Guide and a third party iPhone Repair Service. Sometimes is helps to upgrade to the latest firmware version, but if you still have no signal after that it's either a loose antenna cable or a broken logic board.
Go into your setting<General<Reset<Reset Network Settings
This should fix your problem if it does not then maybe your service provider is to blame, if not just faulty iPhone hardware. In that case you can take your phone into a Apple retail store with an appointment and get it swapped for a new one. ( as long as you are within your hardware warranty)
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I just had the same problem. I used a paperclip to open and remove the sim card tray. I blew on the card and the opening to clear off any dust. After re-inserting the card, the device said "No SIM" for a moment then registered and regained service. I hope it helps!
It seems that your iPhone 2G is in need of activation. To accomplish this, there are 2 ways:
A. (With AT&T as your service provider)
1. If you do not already have an AT&T sim card, contact AT&T and ask for an AT&T sim card to activate service with them. Choose your plan and insert the sim card in the iPhone.
2. Connect the iPhone to iTunes and you will be prompted to follow a few steps to proceed with the activation process.
3. Sync your iPhone for the first time.
Once completed, you will have your iPhone activated and ready to use on the AT&T network.
B. (Without AT&T as your service provider)
1. You will need to download an application to jailbreak your iPhone. (This will essentially remove certain restrictions on your iPhone 2G that prevent you from utilizing your iPhone on another network, among other things).
2. Connect your iPhone to the computer and run your jailbreak application of choice.
Once completed, your iPhone 2G will be activated and jailbroken. The "emergency call" message will disappear, though you will be prompted with a "no sim card found" message until a sim card from AT&T (or another GSM carrier) is placed in the sim tray.
I also had purchased an Iphone clone not to long ago. My service provider was AT&T. 90% of the time when my SIM card was inserted the phone would read "emergency mode". I would have no service, I wouldn't be able to receive or send any calls or text messages. I talked to AT&T representatives who would solve the problem for short periods of time but never gave me a permanent fix. I immediately sent the phone back to the seller. I have been doing a lot of research on these Iphone clones and I have seen quite a few times that people have problems in this area, not being able to have service. Also, what you have purchased and think is a genuine Iphone very well may not be. Many models of these Iphone clones now have the Apple symbol on the back and even have the Apple logo displayed on the screen when they start up. This being the case, you may very well have purchased a fake Iphone which would lead to problems with your service provider. I'm not sure how to fix the problem, and for this I apologize because I know how frustrating it is not to have service. But, I can tell you that your best bet may be to return the phone and try something else. All I've heard is that the genuine Iphone is the best way to go. Because these clones are made by independent manufacturers and not sold through AT&T, even though they may seem nice, many people have constant problems with service. Good luck, and if you find an alternative solution please let me know!