iPhone 4/4s intermittent signal loss cycle

Question

iPhone 4/4s intermittent signal loss cycle

Hi, I now have an iPhone 4s 16GB on AT&T. It is having intermittent signal loss that cycles from full signal to searching every 30 seconds or so. I was having this problem previously on my iPhone 4 after I upgraded to iOS 5. I replaced the sim. I restored it. I deleted all of my back ups and apps and redownloaded everything. I upgraded to the new iPhone 4s. I took it back and got a new one again. The problem has now come back on my 2nd iPhone 4s. The restore usually fixes the problem for 2-3 days but the problem continues to come back. Anyon know how to fix this? Is it a software issue? Will it be fixed in the next iOS update?? Someone please help!! I have a video uploaded to youtube also under Codeman5788 if you want to check that out also.

Cody

iPhone 4S, iOS 5.0.1

Posted on Jan 8, 2012 7:28 PM

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Answer 1

Best reply

unicohijo86

Level 2

260 points

Jan 8, 2012 7:31 PM in response to codyfromgainesville

cody - when you go to Settings > General > About > Version, what do you see? Are you using the 9A406 build? My signal problems went away when I updated my firmware from 9A405 to 9A406.

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Answer 2

Jan 8, 2012 7:31 PM in response to codyfromgainesville

check out this link: this expalins and details the issue and the fix. http://iphone-and-i.blogspot.com/2011/12/fixing-iphone-4s-signal-problem.html

🙂

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Answer 3

Jan 8, 2012 7:37 PM in response to unicohijo86

It says I am using version 9A405. How do I update it to 9A406? I will check out that article! Thank you.

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Answer 4

Jan 8, 2012 7:42 PM in response to codyfromgainesville

ThaT link I posted shows how to do it. You're welcome! 🙂

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Answer 5

Jan 8, 2012 7:56 PM in response to unicohijo86

Hey, I just read the article and I actually did restore it today. How come it didn't update the build earlier today? I am trying it again right now, but it didn't update the build. Is there another way to do it?

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Answer 6

Jan 8, 2012 8:31 PM in response to codyfromgainesville

Select Restore in iTunes Version, not Update.

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Answer 7

Jan 8, 2012 8:46 PM in response to unicohijo86

ok it has finished and it looks like this time it did update the build so I hope it completely fixes the problem! Thank you very much for your help. I will post back if the problem occurs again. Thank you!

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Answer 8

Jan 8, 2012 8:48 PM in response to codyfromgainesville

you're welcome! 🙂 Keep us posted. I only had to update once, and my signal problems never came back.

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Answer 9

Jan 26, 2012 11:42 AM in response to unicohijo86

Hey! I just wanted to update you on my situation. The problem came back this morning 😟 Is there any other solutions? Is this really a software problem? Will it probably be fixed in 5.1? And how come it doesn't affect everyone?

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Answer 10

Feb 2, 2012 10:30 AM in response to codyfromgainesville

There may be a problem with your SIM card because iOS 5.0.1 has been known to "fry" the actual sim card. Follow the instructions here to fix network and signal problems on the iPhone.

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Answer 11

Feb 3, 2012 7:49 AM in response to markymark8

I tried replacing the sim twice already, and I have gotten 2 new phones.

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Answer 12

nyotix

Level 1

0 points

Apr 23, 2012 2:09 AM in response to codyfromgainesville

i hope this is not a hardware problem... it happened to me recently, ios 5.1. i think every 2 minutes the signal drops from 5 bars to no service. i thought tuning off/on the phone and removing the sim will fix the issue

but i didnt. what i did was i turned the 3g off/disable in the network settings. as i turned it off, the signal became 5 bars again... after a few minutes i enabled the 3g again... and so far network signal is not that erratic

dropping suddenly... i hope the said issue is permanently fixed...

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Answer 13

amhir

Level 1

0 points

Aug 20, 2013 3:40 AM in response to codyfromgainesville

I have the same problem. What to do?

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Answer 14

amhir

Level 1

0 points

Aug 20, 2013 3:41 AM in response to codyfromgainesville

I already tried everything still the same

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Answer 15

Sep 11, 2013 2:00 AM in response to codyfromgainesville

Hi I have an iPhone 4 and it has loss of signal issues. Originally I managed to fix it by turning it off for an hour. This worked for a week or 2 then I had to removed the SIM card this worked initially again for about a week but it no longer fixes the problem. I essentially now have a non functioning phone. I checked my firmware and it is 10B329. I'm not impressed as this phone is only 8 months old but it isn't covered by warranty as it was an exchange phone because my other phone had severe unfixable software problems. Any help would be appreciated.

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