1 2 3 Previous Next 37 Replies Latest reply: Feb 27, 2012 2:18 PM by KillerQ
cunnincr Level 1 Level 1 (0 points)

So I was one of the unfortunate people that experienced the signal search loop with the 5.0 upgrade.  By signal search, I mean the phone would have a signal, lose the signal and show searching, then show no service and then jump back to a signal.  This loop from service to no service back to service takes less than 2 minutes which pretty much makes the phone unusable as a phone.  I can get texts to go out when it shows a connected signal but that's about it.  After the iOS 5.0 update when I experienced the problem I was able to do a restore to get the problem resolved. I updated to 5.0.1 yesterday and now the signal loop problem is back.  I'm currently going through the restore now hoping it will once again resolve the issue.  Interestingly enough, i also have an gen 1 iPad and it never has had this signal problem.  I'm guessing that the 3G hardware in the iPad is different than the iPhone and we have some software problem in the drivers on the iPhone.


My wife has a 4S that was also upgraded yesterday and it's also experiencing the same problem.  Please apple, correct this issue, it ***** to have the worlds best phone but not be able to use it. 

  • 1. Re: Signal Search Loop in iOS 5.0.1
    cunnincr Level 1 Level 1 (0 points)

    Restore just completed and so far so good on my signal retention. 

  • 2. Re: Signal Search Loop in iOS 5.0.1
    cunnincr Level 1 Level 1 (0 points)

    Friday night out of the blue my phone (iPhone 4) locked up, I restarted it and the signal loop problem returned.  Tried various things to get the signal problem corrected but nothing worked. I don't know what brought the problem back, I haven't done any OS updates or even any application updates on that day. Problem was still there Saturday morning when I woke up so I did another restore. Once again, this corrected the issue.


    Now here is the real mind twister, same day my wife's phone also goes into signal search loop. She has a 4S. Problem also remained until morning so after I did the restore on mine, I restored hers as well.  We sync to different computers so there is no common root that we share.


    I don't know what triggers this but it is a very frustrating and time consuming resolution.

  • 3. Re: Signal Search Loop in iOS 5.0.1
    cunnincr Level 1 Level 1 (0 points)

    Made an appointment at the Genius Bar today and this is the story I was given.  First I would like to say that the guy at the Apple store was very nice and seeking to resolve the issue.  According to the Genius, the problem with my phone and my wife's phone is that we both upgraded from our 3GS iPhone's to our current iPhones.  He claimed that the restore process brings with is firmeware from the old phone's hardware onto the new phone's hardware.  This firmeware wasn't meant to be on the new hardware so it causes application crashes and other nefarious issues like signal loop search.  So he switched out my wife's new 4S for another 4S, since hers was under warranty, and instructed us to not use a restore process but rather set it up as a new iphone.  For me, he wiped it back to bare OS and instructed me to also set it up as a new install rather than using a restore.  I'm going through that process now and will report back if I continue to have issues. 


    Lesson learned here, when you take this approach, make sure you have photo's, notes and other things that may not be synched directly via iTunes backed up to a location you can bring forward after the new install setup. 

  • 4. Re: Signal Search Loop in iOS 5.0.1
    swmbkrn Level 1 Level 1 (0 points)

    It sounds like you have the same situation that I have had. Restore fixes the problem for a short time but it happens again later. I too came from a 3Gs.

    I would like to know if the wipe to the bare OS and reconfigure as a new iPhone worked for you cunnincr as I don't want to have to deal with going to the apple store and swapping out the phone.


    Thanks for the reply!

  • 5. Re: Signal Search Loop in iOS 5.0.1
    cunnincr Level 1 Level 1 (0 points)

    I'm happy to say that since I went through the "setup as new device" on 11/27, I haven't had the signal search loop problem return on my iPhone 4 or my wife's 4S.


    From my perspective, the phone swap the apple store did, didn't do anything other than save them the time from wiping the phone back to bare OS which of course I could have done myself.  Of course, my iPhone 4 was not eligible for a free swap and they said if I wanted to swap it out, I'd have to pay for a replacement phone.  I knew I didn't need a new phone so I opted for the bare OS setup as new solution.  I'd suggest this approach for anyone else experiencing this problem.


    Of course before you do this, make sure you have copies of all your pictures and backup's of your notes and other in application files because this type of restore will wipe everything out.

  • 6. Re: Signal Search Loop in iOS 5.0.1
    Princemon Level 1 Level 1 (0 points)

    I already did that several times but still i get verry unstable signal and even if i can see full signal, still i cant make or receive calls and sms.


    Im confused if the problem really is the ios5.0.1 or the ota update process that might have affected the sim card while it's inside the phone during the update process.

  • 7. Re: Signal Search Loop in iOS 5.0.1
    cunnincr Level 1 Level 1 (0 points)

    This problem is not new to 5.0.1, it definetly existed in 5.0 as well so it is safe to say it wasn't cause by an OTA update.  I personally experienced it with 5.0 and again after the 5.0.1 patch. 

  • 8. Re: Signal Search Loop in iOS 5.0.1
    Princemon Level 1 Level 1 (0 points)

    so how is your phone now?

  • 9. Re: Signal Search Loop in iOS 5.0.1
    cunnincr Level 1 Level 1 (0 points)

    Princemon wrote:


    so how is your phone now?


    My phone is still working perfectly. 

  • 10. Re: Signal Search Loop in iOS 5.0.1
    Princemon Level 1 Level 1 (0 points)

    how come its like this, i already the same with yours but i still cant solve the problem.

  • 11. Re: Signal Search Loop in iOS 5.0.1
    jimbaab Level 1 Level 1 (15 points)

    Had been experiencing the same problem. Tried many things on this site. (RESTORATION DID NOT WORK FOR ME)


    Restored WHITE iPhone to factory defaults via iTunes 10.5.1, last night. iOS 5.0.1. installed via iTunes. Thought things were fine, but saw same cellular signal loss cycle within 6 hours. Saw it happen again, this morning while checking my wife's iPhone "About" info against mine. Her BLACK iPhone with the same firmware and iOS had its signal. Still need to pay more attention to the BLACK phone to see if it has the same problem. (My wife has been travelling the US on business for two weeks and signal degredation has occured in different locations, but she does not think she has experienced a recurring outage cycle.

  • 12. Re: Signal Search Loop in iOS 5.0.1
    jimbaab Level 1 Level 1 (15 points)

    Made appointment with Genius Bar, today, and they took the diagnostic information off of my phone then replaced it with a new phone. Currently running on 5.0.1, as a new phone, set up in-store by me. Has not been synced to my Mac yet. Will see how it does for the next 24 hours or so.


    NOTE: Apple now has less diagnostic information from my phone, due to the restore I did last night. This may or may not help them, as I only noticed the loss of cellular signal cycle two different times since the sync. I, also, made a screenshot of the occurence this morning, to note the time of occurence.

  • 13. Re: Signal Search Loop in iOS 5.0.1
    cunnincr Level 1 Level 1 (0 points)

    Well, I'm back and once again my iPhone 4 has the signal search loop problem.  Unfortunately this is after going through the "setup as new device' process that the genus bar instructed me to do back on 11/27.  Looks like I can't get through a month's time without having to do a restore.  Very frustrating.  One day it works fine, then out of the blue it gets in a signal search loop. 


    Today I did see something weird happen, I was making a call and during the call the signal was lost.  The phone app dissapeared and it went back to the home screen showing the green bar at the top used to return to the call.  When I'd touch that green bar to return to the call it would flash a white screen like it was trying to go to the call screen but then would go back to the home screen with the green bar.  The call disconnected but the green call in progress bar remained.  Had to reboot the phone to get the bar to go away.  After the reboot, I noticed the signal search loop had returned.  rebooted again, turned on and off airplane mode and signal search continued.  Now I don't know if the signal search problem is what caused the original call to fail or if it started after the call failed. 


    Going through the restore process now so I can get another 24 days of usage out of my phone.



  • 14. Re: Signal Search Loop in iOS 5.0.1
    cunnincr Level 1 Level 1 (0 points)

    Signal search loop returned on 12/25 on my wife's 4S.  We are not at home so she couldn't do the restore process.  Today she took her phone to the AT&T store who claimed the problem was with her SIM card.  They replaced the SIM card and not so surprisingly, the problem remained.  AT&T was unable to provide any further assistance and stated we needed to go back to the Apple store.  In the meantime the AT&T store sold her a pantech phone so she could at least make calls. 


    Today my phone (iphone 4) went back into signal search loop.  In the past, our phones have gone into the search loop on the same day, not sure what caused them to separate by 2 days.  Fortunately, I have my laptop here so I can perform the restore to get it functional again.  Looks like we will be going back to the Genius bar whenever we get back home. 


    Hopefully we'll get another step closer to a fix.  Overall, this has been a terrible customer experience.  Nobody seems to know anything.

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