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Invalid SIM Card on iPhone 4S (5.0.1)

183515 Views 366 Replies Latest reply: Jul 11, 2012 6:49 AM by benny.benzino RSS
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ptnik Calculating status...
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Nov 16, 2011 2:18 AM

Seems to be a widespread problem, from what I'm seeing in the discussions:


I have an unlocked iPhone 4S (bought in France) and use it with Vodafone in Portugal. I was using the same SIM card that worked perfectly fine for over a year on my previous iPhone 4, and it also worked just fine in the 4S... until I updated to iOS 5.0.1.


The very next day I started having connections issues and invalid SIM card errors - requiring a reboot to temporarily fix it for a few minutes, until it lost connection again - the iPhone would still show it had a few bars strength, but was actually unable to make calls or use data. After a while it would go back to invalid sim message.


I replaced my old SIM card, and I though that was it... It was working fine.. until after 3 or 4 days, I find once again that I had a Invalid SIM message.



I've read reports suggesting that this might actually have to do with using other chargers than the official Apple 4S one - it sound kind of crazy, but just in case, I was also using a 3rd party charger when those issues arised for the first time. Anyway, I was now using my previous official iPhone 4 charger when I got the new error with the new SIM card.


Also, although the iPhone recommends using a non-locked SIM Card, mine has always had a PIN, and always worked through activations without a problem.



Other than being a real hardware problem with my new iPhone 4S (crossing my fingers it isn't!) my guess is that this is a software related incident - as this has just popped up after upgrading to iOS 5.0.1, and it would have been an amazing coincidence for SIM cards to go bust, or for the iPhone 4S to suddenly malfunction, afterwards.


Hope you guys can fix it soon, as well as the phone numbers not showing up the callers name in the contacts (that was a problem I was having from the very beginning, with iOS 5.0.0).

  • Nevafazeme Calculating status...
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    Nov 16, 2011 5:40 AM (in response to ptnik)

    I just started having this same problem about 15 mins ago. I took the SIM card out, put it back in, and everything seemed fine for awhile. But now it's telling me that I have an invalid SIM again.  I feel like this definitely has something to do with iOS 5.0.1 because this wasn't happening until I upgraded.

  • harmanfromtoronto Calculating status...
    Currently Being Moderated
    Nov 24, 2011 8:20 AM (in response to ptnik)

    ptnik bro i am facing the same problem as u r and i got it from toronto and using in india with airtel exatly the same problem... plz let me knw whn u find any solutions plz and do reply....

  • harmanfromtoronto Level 1 Level 1 (0 points)
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    Nov 24, 2011 8:25 AM (in response to ptnik)

    sick tired of trying all stuff no responce this virsion 5.0.1 is unlucky for iphone 4s guys any 1 can solve it our if we can de grade to virision 5.0.0 back again >??????

  • janba Level 1 Level 1 (0 points)
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    Nov 24, 2011 8:54 AM (in response to ptnik)

    I was little bit thinking


    Me and my two friends bought the same day iPhone 4S.

    Mine is having these issues with SIM card after 5.0.1 update, and their DON'T




    I have activated my 4S in the Apple Store. Everything was fine but for some reason I switched my SIM back to my older iPhone 4 and was using it for few days. Then I switched iphones so I put the SIM to my already activated iPhone 4S and I was starting having these issues of losing signal, and "invalid SIM" etc.


    What was different what I did and what they did:


    My friends did backup of their old iPhones, activated their new iPhone 4Ss, and did restore from backup and then HAVENT USED THEIR old ones ANYMORE!


    And here is my suggestion:

    Isn't there some security from Apple not to activate more than one iPhone with one SIM card?!


    Maybe I am not right, but who knows:(

    What are your experiences?


    If anybody here activated with this "wrong" SIM card more than one iPhone, there is probably the answer.

  • janba Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 25, 2011 9:20 AM (in response to ptnik)

    after all disabling mobile interne fixed mine problem - by now:(

    hope 5.0.2 will be the right update, that fixes the SIM failure and battery life that might have some


  • janba Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 25, 2011 9:14 PM (in response to ptnik)



    fix for droping signal and a "Invalid SIM" it would sound really strange, like Magician, but it WORKED!!!!

    0. Turn OFF wifi on ur iphone 4S

    1. open the tray with sim card and hardly push with thumb to clean the golden site on ur SIM card (i did it three times)

    and pushed back


    2. Hold power and sleep button EXACTLY for 30s without stop!!! then start ur phone and turn ON wifi on ur iPhone 4S

    3. tick Airplane mode, wait 10s and untick Airplane mode


    and I also did fron desperation point 4.)

    4. activate Siri and say: "let my SIM card work!"



    and Since did these steps, I had no Invalid Sim!!:))

    at least 24 hours no problems (knock-knock)

  • neott Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 27, 2011 4:02 PM (in response to ptnik)

    Yet another one here, been having "Invalid sim" since last monday 2- 3 times a day....


    However I have been developing on this phone all weekend (plugged in via USB to my mac mini) - no errors for a good 14 hours on Saturday, unplugged it at 2am and went to bed.

    when I checked it at 8am guess what? yeah "Invalid sim"


    Its been plugged in again all day (15 hours) and no errors - I would be willing to put money on an "invalid sim" message when I wake in the morning after it has been unplugged.


    Not sure what this really means, but I am guessing something around voltage drop or something when the phone is not plugged in due to battery discharge or something?


    Anyone else get sim errors whilst charging overnight or does this just seem to be whilst running off the battery for everyone?

  • rarmesin Calculating status...
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    Nov 27, 2011 4:15 PM (in response to ptnik)

    can we return the iphones4 to the apple company if in case we lost our receits and warranty?

  • neott Level 1 Level 1 (0 points)
    Currently Being Moderated
    Nov 27, 2011 4:42 PM (in response to neott)

    Quick update on my previous post...


    Sure enough it just displayed "Sim Failure" - Invalid sim



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