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

Sounds prettymuch like my problem. I have reset my iPhone 4S to factory settings but it didn't help. The same problem occurs after. I use the sim in my old 3GS and that works fine.

Haven't tried the change of sim but hopes for a 5.0.2 fix instead...

Hey pluck007,

Same issue with me, you can use the phone normally if you turn off Cellular Data setting (Settings > General > Network). You can still access the Internet through WiFi without facing SIM failure issue every 5 minutes

This is a workaround which worked for me. But for sure I am waiting for Apple for at least to talk about this issue.

Same thing for iPhone 4S bought in Canada unlocked and being used in Argentina with Movistar. Today I changed the SIM card. Problem persisted. Battery drains FAST even under 5.0.1. The worst thing is that I recommended a Blackberry user to jump to iPhone and he's incommunicated. Tried disconnecting Cellular Data and it seems to be working since I started to write this blog entry. After 40.000 views and reports from all over the world and carriers Apple is still doing anything?!

I have the same problem. I bought the iPhone 4S unlocked in Canada and use it in Brazil with TIM carrier.

I cutted my old sim card to fit into the iPhone trail. Tomorrow I'll by a micro sim card, change the old one and see if it works without problems.

I have the same problem. Called Apple Care in China just now. The first lady couldnt solve my problem so she got me a "senior engineer" to answer my question. I told the guy I started to experience the problem after install IOS 5.1. The "senior engineer" insists there is nothing wrong with iphone 4S nor IOS 5.1. He claims the no signal problem is a result of the current mobile network in China being incompatible with iPhone 4s, as the model is currently not out in China yet.

I don't know if this is true but don't think all of us having the same problem share similar background (i.e.brought back iphone 4s from another country, as iPhone 4s is not out in where you live yet)...

same problem happened to my unblocked Iphone 4S brought in Italy and being used in the same country.

When I bought and connected to internet, immdieately updated to IOS 5.0.1, so I didn't experience that passage with 5.0.0 no error but with 5.0.1 there is error.

I would like to point out it seems that this problem is linked to the acttivate/disacttivate sim PIN.

when i put the new sim card, I switched off the sim PIN function, it took very long time to apply my request, then the signal bar disappeared, saying "searching network". after few hours, arrived this error.

I got my iphone 4S from the store in CANADA, and it`s givin me the same message Sim card failure, and I was on a trip, I actually live in Brazil, and I really don`t know what to do, because here you canot take to the apple store em receive a new one. I have already tries differents sim cards and nothing.

I have the same problem that I bought the phone in Australia and currently I am living in Vietnam. I made 4 phone calls to Apple Australia and it costed me nearly equal the price of the iphone because the 3 different consultants told me that I can get the phone exchanged in Singapore while in Singapore they said I can't. So on my last phone call to Australia, I received the answer that I can't get the phone exchanged in Singapore! So now I have no choice but to send the phone back to Australia to get it exchanged. What a pain in the **s! Very dissappointed with Apple not only about the product but also the service!

Sent my 'SIM FAILURE' phone back to Apple on Monday afternoon in their pre-paid packaging. I'm at work and my other half has told me it's already come back and it's only Wednesday. Can't imagine they tested it unless it showed the error straight away. I'll restore the phone tonight and let you know how I get on.

@buij77

I am also living in Vietnam. I have managed to get my 4S working, but not on my carrier (Mobifone).

Which carrier are you using? If you are not using Mobifone I can give you some suggestions on how to get your phone working.

Итак, мне кажется, я решил проблему : iphone 4s, kyivstar.

Изначальный микросим не захотел работать на 4s хотя на старой 4ке все было ок.

Отправившись в офис Киевстара, я долго пытался обьяснить что мне нужна карточка 128кб.

"мы не знаем какие карты нам поставляют" , говорили они.

Но спустя какое то врея, методом визуального сравнения я взял большую карту на вид отличающуюся от микросим. (внимание: на микросим черные полоски, контакты о бокам шире чем на работающей карте, еще раз : вам нужна карточка где поперечные олосочки находятся ближе друг к другу нежели на обычной микросим)

Вообщем не знаю что да как, но пока 3. Часа полет нормальный:) дальше отпишусь. Кому надо, пишите на мыло скину фотки обеих карточек что бы вы понимали разницу.

NO Steve NO Apple!!! Now it is obvious!!!

If 5.0.2 does not solve the problem I return the iphone and get android phone.... I was with APPLE from first iphone 2g and was changing it every year to newer model, also I've switched 4 my friends from nokia to iphones, now it is enough! Two of them have the same problem with 4S!!! Two was smarter and refused to buy 4S!!!

AND NO REPLY FROM APPLE!!!! NICE JOB!!!

Oh noes, I have my iPhone 4S sim in a really old phone (you can only call and text, dark ages or what) while my 4S is away being repaired and it's just randomly said 'Unregistered Sim' after working fine! Turning the phone off and back on again the same as with my 4S solved it.

It's a replacement Sim so it's really odd, could my 4S have damaged my Sim in some way? It's only happened the once and I've been using it for 3 days almost, not sure what to make of it.

Аналогично перепробовал все, что пишут. Проблемы нарастают как снежный ком, сначала сеть отваливалась 1-2 раза в день, а теперь просто через раз, причем все индикаторы показывают наличие сети и только при попытке позвонить или выйти в интернет ты понимает, что связи на самом деле нет. Мегафон СПб сим-карт 128к не имеет и ничем помочь не может.

One of the greatest cellular provider - Megafon - has no 128k SIM-cards at all. How should we solve this reason, Apple? You must to make 5.0.2 asap abd fix thr problem or let to peoples to setup 5.0.0 firmware back.

ok - my iPhone got returned.

I did it not because I was unlucky and got a faulty product, but because Apple keeps ignoring all of us. Thousands of users complain and Apple is too cool to talk to the idiots who pay a fortune for a phone with which you cannot make calls.

I am dissapointed.