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iPhone 4 "Losing Cell Signal"

6115 Views 8 Replies Latest reply: Aug 5, 2010 5:45 PM by Bob Johnston1 RSS
Bob Johnston1 Calculating status...
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Aug 1, 2010 9:29 AM
Strange problems are occurring with my iPhone 4. For lack of a better term, I'm losing the cell signal. Apple has replaced my iPhone 4 once and I've been using a non Apple Bumper case since I got the iPhone 4 on July 1st.

Once or twice a day, the iPhone will just lose connection with the cell signal. I know this happens because no phone calls and text messages can be sent or received. I have to power off/on the iPhone and then I will receive text messages that were piling up and can make a call. This happens at numerous locations (work, home, Best Buy, Kroger, Target, etc). The cellular bars are always showing as strong when I notice the problem.

I've done two factory restores, one on each phone, and the problem continues. I've ordered the Belkin case through Apple's case program and will try it when I receive it. I'm running iOS 4.0.1.

If my iPhone 4 continues the lost cell problem with a different case, than I would assume it's an iOS issue.

Anyone else experiencing the same problems?
iPhone 4, iOS 4
  • ccleve1 Calculating status...
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    Aug 2, 2010 2:13 PM (in response to Bob Johnston1)
    I have been having the same problem. I keep having to shut down the phone in order for it to find the cellular signal again. it is very frustration because I keep missing phone calls and text messages. The other thing that seems to work is to put it in airplane mode then turn airplane mode off and it will reacquire the cell signal.

    If it keeps happening I'm going to reset the iphone within iTunes and see if that helps. It has only started happening after the 4.0.1 update.
    24" iMac 2.33GHz Core 2 Duo, Mac OS X (10.4.9)
  • Tidey Calculating status...
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    Aug 2, 2010 5:40 PM (in response to Bob Johnston1)
    I think it has to do with the upgrade to 4.0.1. I bet you had better "service" with 4.0, didn't you?
    Dell, Windows XP
  • ccleve1 Level 1 Level 1 (0 points)
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    Aug 3, 2010 8:28 AM (in response to Bob Johnston1)
    For me it seemed to start after the upgrade to 4.0.1
    24" iMac 2.33GHz Core 2 Duo, Mac OS X (10.4.9)
  • Tidey Level 1 Level 1 (0 points)
    Currently Being Moderated
    Aug 3, 2010 12:54 PM (in response to Bob Johnston1)
    I am having the SAME PROBLEM!

    I called Apple yesterday and they told me that if I had full bars (5) before the 4.0.1 upgrade and was now showing 2 or 3 bars that I was actually getting "full" bars. I have no idea what Apple is doing with this.

    FIX IT!
    Dell, Windows XP
  • Daiya Level 4 Level 4 (1,655 points)
    Currently Being Moderated
    Aug 3, 2010 1:33 PM (in response to Bob Johnston1)
    I ran into something similar while on vacation recently, and a few times did the airplane mode on/off to force it to reacquire---but it was not something that I had noticed happening at home at all. A friend with a 3GS also noticed it---again, not a problem noticed at home. So it may be specific to place (this was Maui).

    I would report it to AppleCare (either phone or Genius Bar) to ensure it gets logged and tracked.
    MacBook Pro 2ghz, Mac OS X (10.5.8), iPhone 4, MobileMe

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