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iPhone 4 keeps saying "No Service"

So I've had the phone since about two weeks after it came out and for the past few hours it has said no service and all my other friends are not having this problem who are standing right next to me so im not in a deadzone. Ive tried restarting my phone numerous times and still I have no service... any ideas?

MacBook Air, Mac OS X (10.6.1), 13"

Posted on Sep 26, 2010 9:24 PM

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59 replies

Sep 26, 2010 11:57 PM in response to landwirth

Assuming you haven't hacked/jailbroken the phone, try the following steps:

1. Reset phone - press both home and sleep/wake buttons until the Apple logo appears.
2. Settings > General > Reset > Reset Network Settings
3. Restore phone in iTunes using a backup.
4. Restore in iTunes as a new iPhone, without using a backup.
5. Get a new SIM card from AT&T.
6. Make an appt. with an Apple Store Genius Bar.

If you have jailbroken your phone, particularly if you unlocked it, SOL.

Sep 27, 2010 10:12 PM in response to captainfairweather

So if you didn't jailbreak and unlock, what's the deal with T-Mobile? You should be on AT&T. BTW, jailbreaking and unlocking are legal (as mentioned) but will certainly void your warranty. Apple will not provide any support for jailbroken iPhones. As for disabling, they filed for a patent a long time ago for a method of disabling hacked iPhones. That doesn't mean that the technology is actually in place. Also, with jailbreaking being legal, Apple might open themselves up to significant liability should they remotely disable a hacked iPhone (assuming it does NOT have cracked apps - which is illegal). It's much easier and less potential liability to simply close the exploits as they are found.

You should find the reset network setting to do the trick. Also try a hard reset by holding the home and power keys until the iPhone turns off then back on. For some reason, after an update, I had to reset network setting three times before I got the ATT icon and my service back. But if all else fails, Apple support is outstanding. Hope there's an Apple Store near you. If not, Apple's excellent with their replacement policy. I had a bad Airport Extreme. The replacement was in my hands via FedEx in less than 24 hours. Apple Care is absolutely the best.

Sep 28, 2010 9:27 AM in response to landwirth

I had the same problems on Cyprus (holiday) and had strange behavior with "No service":
The day of arrival my iPhone 4 picked up the signal from the local provider
The next day (I turned the iPhone off at night) I couldn't get any connection ("No service"). I tried several things (resetting the phone, taking out SIM card etc...) but nothing worked
A day later I tried resetting the network settings and after 10 minutes or so I had connection again. So this seemed to work.
However, when I had No service in the days thereafter, resetting the network settings did not help
But in the last days of our holiday, the phone connected from itself again
Maybe it was the local network playing up, but I think that's unlikely, because my wife had reception all days with her Nokia

Back home (Netherlands) I tried to reproduce the problem, but I always had connection. Last week I went to Germany and over there the connection was fine also.

So I'm a bit in doubt now whether I should bring the iPhone in for service.

iPhone 4 keeps saying "No Service"

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