Sim Card Failure No Sim with iPhone 4S Anyone Else?

I tried everything I could: restore to the newer 5.0.1 build, replace the micro-SIM for a 128KB one, restore the iPhone (as a new iPhone) while in DFU mode... Nothing happened.

My problem is that my iPhone shows full signal strenght, but I cannot make or receive calls. I must turn airplane mode on and off to make it work again.

So, I replaced for another brand new iPhone 4S and... the same problem persists.

I only get this problem when I'm at work. Could it be something wrong with my cell company (Claro - Brazil)?

Hey! My 4s is working fine on 1.0.14 and 9A406 at this moment. But i had an different issue, than you guys are having. Anyway, could you imessage me? (x67)74x-8x-xx (x=0)

Hi everybody ! First happy and healty new year !!First i bought my first 4s like 45 days ago directly i update to 5.0.1 than its start showing sim failure when i was trying to call somebody call failed when i was trying to send text its again showing text failure than i went to apple store and show them screenshots and they sent it back and give me the new 4S.Than i was scaring for upload 5.0.1. Also i was thinking problem is 5.0.1.But i update my phone to 5.0.1 . Im using like 3 days and everything pretty good ! I would like to say to you guys go and try to change your 4S.Now im thinking problem is phone ! And im using my phone with 64 kbs micro-sim card.

Hi, I bought my 4s in UK and I am using it in Ukraine and have the same problem. Losing signal, no sim message etc.

OLGUNOZTURK wrote:

But i update my phone to 5.0.1 . Im using like 3 days and everything pretty good ! I would like to say to you guys go and try to change your 4S.Now im thinking problem is phone !

Now are there 2 different iPhone 4s in addition to 2 different 5.0.1?

I wonder, do the phones have some different part inside, then they should have different model numbers (unless Apple is so dumb to name them equally, like they did with 5.0.1 firmware).

Mine defective one (non-working on 5.0.1) was a black 16Gb with "Model A1387 EMC 2430" sign on a back. OLGUNOZTURK, could you share your color/capacity/model of a phone working under 5.0.1? And which 5.0.1 exactly also, 9A405 or 9A406?

No right now there is just one phone cause apple store change my phone with new one. Sure i can share,my phone is white / 32gb / Model:MD245B and the version is 5.0.1(9A405). Firmware is 1.0.13

If u have another question just ask me,you are welcome 🙂

I see, 5.0.1(9A405) is not the freshest 5.0.1. Problem spotted on 9A406, modem 1.0.14. And if you have 5.0.1 already (no matter the numbers in brackets) iTunes will say you have the latest firmware (or maybe they just disabled 9A406 recently). So most likely the problem is in 1.0.14 modem.

Thanks for info anyway!

Hi igarrik!

have you tried registering your iphone with your number?

try to iMessage me at 639175954323

+1 here in egypt any update on this issue

Hi All,

As I'm sure most of you know, iOS 5.1 (the first big update to iOS 5.0) is in beta and I believe being tested by developers. So, it is not yet a done deal. I'm sure everyone in this discussion forum hopes that iOS 5.1 will contain a substantive fix for this SIM issue.

Until the actual release of iOS 5.1, I think it is still prudent to keep sending feedback to Apple about the problems you have had with your iPhone. As I mentioned earlier in this discussion, Apple needs accurate feedback to guide its decisions as to what issues are significant problems needing aggressive attention and which are not.

I am copying part of my old post here as this discussion has become so large it is getting hard to read it all and perhaps many viewers did not read the original post. Remember, this Forum is for Apple customers to share questions and answers. It is not a way to let Apple know what functionalities of its products are not performing up to spec. That's what its Feedback site is for. Let's help Apple (and US!) out and send them the feedback they need so that hopefully they will decide that this SIM issue is of significant importance. The more feedback, the better chance iOS 5.1 will offer many of us in this disussion relief from our SIM problems. Here is the relevant part of my old post...

...If writing your own feedback comment seems like a lot of effort, I offer you these few sentences below that you could just copy and paste into the feedback site.

The link to feedback site is: http://www.apple.com/feedback/

Feel free to use copy/amend/whatever the following as you wish:

Dear Apple,

I wish to register a strong concern about my iPhone's unpredictable inoperability due to failures somehow associated with it's SIM technology. For me, I do not consider this just a significant lack of convenience, but a significant safety issue. Should I need my phone in an emergency situation where it is experiencing a SIM FAILURE, I believe the iPhone will have put me at risk. I would ask you to please give fixing this problem your greatest priority and effort.

Sincerely, XXXX

My phone is Black 16gb

Model: MD234LL

Version:5.0.1 (9A405)

Firmware:1.0.13

I am having the same issue so I don't think the problem is in 1.0.14 modem.

Hello everyone,
I purchased an iPhone 4S in version 5 two months ago from Canada and everything worked correctly until I update to version 5.0.1 and since then show up message

"Sim failure" at random time.
Device information:

Type: 4S

iOS level: 5.0.1 (9A406)

Model: MD234C

s/n: C38GL*

Firmware level: 1.0.14

I tried to do all the suggestions listed in this forum including the new upgrade to 5.0.1.
Eventually I sent the device to Apple Store, and got a new one in version 5.

Since then (4 days) the message does not appear "Sim failure" any more.

The battery holds a lot longer even though the device came on version 5.
The new device information:
Type: 4S

iOS level: 5 (9A334)

Model: MC922LL

s/n: C39GK*

Firmware level: 1.0.11

In my opinion, Apple hides a HW problem on all first models and gives you an expectation (by silence) that the issue will diminish in the next iOS version.
I suggest, go to Apple store and replace the device ..

Thank you

I had the same problem.

I bought my 4S in Chicago and when arrived home (Brasil) it started to unrecognize the SiM card.

I just called Apple and they replaced my device, it's really simple!

I am disappointed. After three days of normal use Iphone again began to work with a network problem.

It appears that exchanging phones sometimes works and sometimes doesn't. An exchange of phones can be difficult for some of us because of where we live. Also, there are probably enough exchanged phones in the pipeline now that when you get a "new" exchange phone it could very well be a refurbished phone (something about that bothers me). So that all of us could get a sense of how effective an exchange of phones is in solving this problem, could those of you who have exchanged for another phone kindly post one of the following:

Option 1: Exchanged phones...Everything works fine now.

Option 2: Exchanged phones...Still have the SIM problem.

Sorry to impose, but this may help some of us to decide whether it is worth the effort to go through the process of getting a replacement phone.

Thanks very much, Mr. Luigi