Unlocked iPhone4S - Invalid SIM or No Service error

Invalid SIM or No Service error occurs after few hours the iphone has been turned on.
Appreciate your help on this.
Thanks.

There's also a direct download of the latest build of iOS 5.0.1 here:
http://appldnld.apple.com/iPhone4//041-3417.20111215.Slnt4/iPhone4,1_5.0.1_9A406 _Restore.ipsw
Install it by Option-clicking the Update button (Shift-click in Windows) in iTunes and choosing the downloaded file. News sites have reported that the new build fixes the Invalid SIM for at least some people.
Hope this helps.

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I have just moved to Spain and out in a Spanish sim into my Irish bought iPhone 4. It says 'invalid sim' and 'no service'. The phone is not locked to any provider. I have been told that its a handset issue. Please advise.

I have just moved to Spain and out in a Spanish sim into my Irish bought iPhone 4. It says 'invalid sim' and 'no service'. The phone is not locked to any provider. I have been told that its a handset issue. Please advise.

1). Are you positive the phone is not locked? Where did you buy it? Did you get it unlocked from your original carrier? Only Apple sells unlocked phones in most countries.
2). Did you try with a diffrent SIM. MAybe the one you have is defective.
3). Does the Spnaish carrier you are using support the iPhone? Who told you it is a handset issue?

"Invalid Sim" Or "No Service" On 4S Phone

I have just bought an empty phone 4S from Singapore M1 Shop.
Due to my employment in China, I have changed to the China micro sim card.
Sometimes, there is network but after sometimes, it appears "Invalid Sim" or "No Servive".
I have approached the APPLIE store in Shanghai China but no one can solve this problem.
Please do anyone encounter this problem? I need help or advice desperately. Thank you.

Here's my experience w/ the Invalid SIM message:
http://www.pretenseofknowledge.com/2011/11/02/whats-up-with-the-iphone-4s-and-io s-5-battery-woes/

Why would a factory-unlocked Iphone get an invalid SIM error?

I bought 2 unlocked iPhones to sell overseas and they are giving an invalid SIM error. Both of them are the factory-unlocked version. Could someone help me with this?

Positive that they are unlocked. I bought them personally at an Apple Store and the invoice says unlocked iPhones (I also paid the unlocked iPhone price).
The Cell Service Provider has iPhone as one of its supported phones. Not sure exactly which MicroSIM the person is using though.

After unlock my iPhone 4 iOs 6.0.1 is not accepting any sim , i tried using new sim first it shoes no service then sim failure and invalid sim . what should i do do make it work

after inlocking my iPhone 4 iOs 6.0.1 it shows no service when i used a new sim .

If it is showing invalid SIM error, then the unlocking is not complete. Depending on what carrier authorized the unlock, most require the phone to be restored before the unlock is complete. Once you restore, you should receive a message stating Congratulations, your phnoe is unlocked. Then you restore the backup of the device from before the unlock restore.

I've bought an Iphone 4S in the UK. Using the phone in Argentina, it displays the "No Service" and "Invalid SIM" errors sporadically. The only solution is to reset the phone (switching it ON/OFF). Any suggestions?

I've bought an Iphone 4S in the UK. Using the phone in Argentina, it displays the "No Service" and "Invalid SIM" errors sporadically. The only solution is to reset the phone (switching it ON/OFF). Also most of the time, the SMS are not sent nor received...
The phone was checked by my carrier (phone company, Movistar) and they replaced the micro SIM card. bear in mind that there's no Apple shop here and the Iphone 4S is NOT available in Argentina!!!
Any suggestions?

Dear all,
(THIS CONCERNS MTC TOUCH CUSTOMERS IN LEBANON)
I've received an email with a solution to the problem; you have to update to the new iOS 5.0.1 firmware (9A406)!! It's been 1Hour and so far my iPHone 4S is working just fine. Please follow carefully the below instructions:
RUN A FULL BACK UP BEFORE DOING ANY OF THIS
1. Download the new iOS 5.0.1 firmware (9A406) from the internet. (800MB)
2. Connect your iPhone 4S to iTunes.
3. Once connected, two options will show: ‘restore’ and ‘check for update’.
4. Press down SHIFT and choose ‘check for update’. (if you click ‘check for update’ without pressing down SHIFT doesn’t work.)
5. Select the new firmware (9A406). Note that the file should be renamed ‘iPhone4,1_5.0.1_9A406_Restore.ipsw’ (instead of ‘iPhone4,1_5.0.1_9A406_Restore.zip’), i.e. changing the file extension from ZIP to IPSW. iTunes will now work alone and update your iPhone 4S.
A full back up is recommended before firmware upgrade.
HOPE THIS HELPS

HT201328 My unlocked iPhone 4 shows "No Service" and after airplane mode turned on and off, shows "Invalid SIM"

I recently bought two iPhone 4 phones from my colleague in USA. He unlocked these phones from AT&T. But I did not test it. However, now that I am back to India, and inserted my Indian Vodafone SIM car, the phone shows "No Service" and if turn AirPlane mode ON and then OFF, a message comes as "SIM Failure", and the top left corner shows, "Invalid SIM".
Now, how do I confirm whether my colleague was successfully able to unlock these phones ?
What are the steps to make my Indian Vodafone SIM work ?
Any support appreciated.

Hello there Vicky,
Here is a great article for troubleshooting the Cellular connection on your phone. From article iPhone: Troubleshooting a cellular data connection found here http://support.apple.com/kb/ts3780:
Follow the instructions below for assistance with troubleshooting cellular data issues on your iPhone. After performing each step, please test to see if the issue is resolved.
Toggle airplane mode: Tap Settings, turn airplane mode on, wait three seconds, and then turn off again.
Restart your iPhone.
Ensure that your software is up to date:
Check for a Carrier Settings Update. Tap Settings > General > About.
Check for an iOS Software Update. Tap Settings > General > Software Update.
Note: Some updates may require a Wi-Fi connection.
Remove the SIM Card and reinsert it. Allow the iPhone to acquire the network again.
If your SIM card has SIM PIN enabled, try toggling it off: Tap Settings > Phone > SIM PIN.
Try another location. If a different location works, but the original location still does not, contact your carrier to report the issue.
Reset network settings: Tap Settings > General > Reset > Reset Network Settings.
Restore the iPhone as new.
Contact your carrier to:
Verify that the iPhone is properly set up on the account with the appropriate, current data plan.
Verify that there are no account-related blocks.
Find out if there are specific error messages in the carrier logs that could help determine why the issue is occurring.
In order to verify if the phones have been unlocked, the original carrier for them would have to be called.
Take care,
Sterling

Thanks this was very useful.. I have a brand new iphone 4s unlocked version from singapore and I am having the same problem constant network fluctuations, no service, call failed, invalid sim, sim failure, bars fluctuating from 5 - 3 - 2 - 1, no signal/ba

I have a brand new iphone 4s unlocked version from singapore and I am experiencing constant network fluctuations on my iphone , no service, call failed, invalid sim, sim failure, bars fluctuating from 5 - 3 - 2 - 1, no signal/bars searching etc... Ifeel miserable after trying out all the options changed multiple sims, tried multiple carriers, restored the phone back and have set-up as new device but the problem does not get solved... its is so frustrating that after investing on a world's most expensive phone you cannot enjoy the calling features which the phone offers which is the main thing you own the phone for.. Rest of the things are working.. The funniest part I am not able to make calls or receive calls but can access the internet.. I have tried every possible thing and really very frustrated with this iphone of mine...I hope the problem gets solved.. would anyone have any solutions to this problem.. Does it mean one should never update software as I hear that after updating to IOS.5.1 the problem has started coming and same has been with there.... Apple says its a hardware failure which is very difficult to digest as sometimes I get 5 bars and able to make and receive calls but 95% of the time I am unable to. If anyone has any solution I will be very happy if he or share can share the same. Many thanks. its so disgusting to experience this on top of this apple does not support global warranty for the phone as you need to go to the country from where you bought the phone for replacement.. Truly sad state of affairs.. very very very dissappointing.

Have a look at this it might help
http://support.apple.com/kb/TS4148

I had already update mi new factory unlocked iPhone 4S to iOS 5.1.1 and I still having problems with "invalid sim". I'm from Argentina and here we don't have official service. PLEASE HELP ME, WHAT CAN I DO??? In Argentina is too expensive an iPhone 4S.

I had already update mi new factory unlocked iPhone 4S to iOS 5.1.1 and I still having problems with "invalid sim". I'm from Argentina and here we don't have official service. PLEASE HELP ME, WHAT CAN I DO??? In Argentina is too expensive an iPhone 4S. Please I need help to continue believing in Apple. Thanks a lot. If anybody speak spanish better.

Was it purchased from an official Apple Store, not a reseller? Only Apple Stores sell official factory unlocked phones. The others sell hacked to unlock phones, and the unlocking is unstable.
Try these steps, as needed:
1. Reset phone - press both home and on/off buttons for at least 10 seconds until the Apple logo appears.
2. Settings > General > Reset > Reset Network Settings.
3. Replace SIM card (and reset network settings again)
4. Restore Phone in iTunes using a backup
5. Restore in iTunes as new, without using a backup

I purchased an unlocked iPhone4 last month. Everything was fine till yesterday. Today morning when I tried to check mail, i suddenly got an error message saying " Could not activate cellular data network: you are not subscribed to a cellular data service"

I purchased an unlocked iPhone4 last month. Everything was fine till yesterday. Today morning when I tried to check mail, i suddenly got an error message saying " Could not activate cellular data network: you are not subscribed to a cellular data service", when I checked on my network settings i was not able to find the cellular data network tab ( where we use to input APN manually). i even tried to restore my iPhone to its factory settings, Still it remains the same. i cant able to connect to Internet using cellular data. help me...Plz..

Where did you purchase it from? There are lots of iPhones sold as "unlocked" which are carrier locked phones that were hacked and are not officially unlocked. These phones are subject to re-locking to the original carrier, particularly when updated.

IPhone 5 factory unlocked, invalid sim

My iPhone 5 was factory unlocked by T-Mobile Austria. I've got an unlocking guidance. I've made it through, but I get Invalid SIM error all the time. I've contacted T-Mobile several times, if they completed my request.Their answer was: AL_PENDING_UNLOCK The imei'01341600574xxx' is pending unlock. Any solutions?

If you did not get the "Congratulations, your iPhone is unlocked" message when you restored iOS, then the unlock is NOT complete. Talk to the carrier again. You may also want to call AppleCare and ask them to check the unlock status in their system via the serial number before hand just so you have some ammunition.
Now... I'm not implying that you have done any such thing, but just for the sake of complete information, if the phone was ever hacked, jailbroken, or otherwise "unlocked" by anyone other than the carrier it was originally locked to, it may no longer be possible for it to process a legitimate unlock.
Is it still able to activate using a T-Mobile Austria SIM? Are you the original owner of the phone?

"No Service" error in a Factory Unlocked iPhone.

I'm using iPhone 3GS iOS 6.1 with 05.13.04 Baseband. My phone is Factory Unlocked with Turkey / Avea. But I get "No Service" error. Why does this happen and how do I fix it? I'm already using an Avea SIM Card.

Contact Avea about this. Here's how:
Contact a mobile carrier

Basically my fone just decided to say invalid sim so by looking on the internet ive restored my device, after doing this it still came up with no service and invalid sim, itunes say that the activtion server is down at the mo, i wanted to know wen the act

Basically my fone just decided to say invalid sim so by looking on the internet ive restored my device, after doing this it still came up with no service and invalid sim, itunes say that the activtion server is down at the mo, i wanted to know wen the activtion server will be back online and will it solve my problem with no service and invalid sim error

I was quite surprised by that. And I've been off for a little because I've been giving final exams at the college where I work. Now with break I will be spending a little more time on here until I have to start getting ready for the Spring semester. I have experienced a couple of interesting posters in the past week though. I wa afraid one was going to reach through the CAT 5 and grab me around the neck.

HT1414 I have unlocked my phone but it says invalid sim what do I need to do?

I have unlocked my phone but it say invalid sim what can i do?

How did you get your phone unlocked? If you didn't get it officially unlocked, you'll get that error message.

I would like to know how to get my iphone on if it goes into a no service mode and shows as invalid sim, I would like to know how to get my iphone on if it goes into a no service mode and shows as invalid sim

I would like to know how to get my iphone on if it goes into a no service mode and shows as invalid sim, I would like to know how to get my iphone on if it goes into a no service mode and shows as invalid sim

actually I found the solution :
http://www.igeneration.fr/itunes/astuce-votre-historique-d-achats-itunes-12056
it's in french, but the images and google translate will be enough
hope that helps for the others having the same kinda problem

Unlocked iPhone4S - Invalid SIM or No Service error

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