Iphone 4 constantly has "no service"

Question

Level 1

8 points

Iphone 4 constantly has "no service"

got an iphone 4, updated on the latest firmware 5.0.1, its currently locked on O2. It was working fine with no problems up until about a week ago, on the odd occasion my service comes back, but even still the connection is fairly poor, and the 3G is temperamental, comes and goes. Even when im travelling through different areas the problem still occurs so it cant be O2 as its highly unlikely that all there network towers are down, for example i live in london, a couple of days ago i was in cardiff, and the problem had still occured "no service". Even still O2 have confirmed there network towers in my local area are up and running. Ive tried various things on the phone itself such as switching carrier to "manual", turning on/off data roaming, mobile data ETC..

Any ideas?

iPhone 4, iOS 5.0.1

Posted on Jan 29, 2012 1:43 PM

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Answer 1

Jan 29, 2012 1:49 PM in response to horyna

I was having slow data connections last week - sometimes no data access at all for brief periods while my iPhone 4S showed 4 bars of reception via 3G.

I called AT&T which checked for any reported problems with towers in my area and found none. AT&T reset my connection which required having my iPhone powered off. Took less than a minute. I called from a landline.

After powering my iPhone back on, everything was back to normal.

If not, I was instructed to resert network settings on my iPhone and if no change after that, the next step would likely be getting a new SIM card. I haven't had to do either one.

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Answer 2

horyna Author

Level 1

8 points

Jan 29, 2012 1:52 PM in response to Allan Sampson

Hi, cheers for a reply! yeah ive tried everything such as reset the network settings, still no luck. even got a new sim card. hasnt made the slightlest difference.

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Answer 3

Jan 29, 2012 1:55 PM in response to horyna

You're welcome.

Have you called O2 to reset your connection at their servers as I did with AT&T?

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Answer 4

horyna Author

Level 1

8 points

Jan 29, 2012 1:58 PM in response to Allan Sampson

yeah tried that as well, im starting to think it might be the phone itself, but at the same token, if it was the iphone, why does it get a connection on a rare occasion

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Answer 5

wegras

Level 6

15,305 points

Jan 29, 2012 2:06 PM in response to horyna

You seem to have tried the obvious .Have done a full restore first with backup or as new if backup fails

Here is a link in case yoiu are unfamiliar

http://support.apple.com/kb/HT1414

made my iP4 more stable with 5.0.1

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Answer 6

horyna Author

Level 1

8 points

Jan 29, 2012 2:15 PM in response to wegras

done restores a number of times, both with and without backups, nothing still.

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Answer 7

wegras

Level 6

15,305 points

Jan 30, 2012 3:45 AM in response to horyna

Take it to an Apple Retail store Genius Bar and if they confirm faulty hardware they can exchange for a refurb unit

chargeable if it is out of warranty £119 if an iPhone4

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Answer 8

bradalee

Level 1

9 points

Feb 11, 2012 3:39 PM in response to horyna

Hi there,

I found a solution for my iPhone 4 with no service!!

I bought the phone about a week ago with a broken screen, so i repaired it and it worked fine!! I then realised it was locked to Vodafone so jailbroke it hoping to be able to unlock it. When jailbreaking the phone it avoided having to activate it which i think caused the issue. Any way ultrasnow haddent released an unlock for 04.11.08 baseband so i decided to just get a free micro sim from vodafone. Once recieved i restored my iPhone to factory default (5.0.1) with the new micro sim in and hey presto it picked up signal just like that!!

So the main point it:

If your jailbroken and your having issues then restore and activate the phone with the orignal carrier sim card!!

Hope this helps some people!

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