iPhone 4 Lost Carrier, No Service

Hi sn4p2k and others,

I am also experiencing a similar problem.

iPhone 4 purchased from Apple store 5 months ago.

No issues until suddenly "No Service"

Have tried a new sim from the carrier - did not fix the issue.

Have tried another carriers sim which I know works in another iPhone - did not work in my iPhone.

I've done a network reset - did not fix the issue.

Have done a soft reset - did not fix the issue.

I Have done a Hard Reset - this did not fix the issue.

I will try to do a Reset using iTunes - as above I don't think this is going to work.

I will try a factory reset - not looking forward to doing this, but if this is what is required to fix the isue then so be it.

But my other problem is - what caused this issue and what is to stop it from happening again?

ANY ideas/information would be greatly appreciated regarding the above issue.

Cheers

Hi

I just started facing the same problem. I tried using my aim in another iPhone and it works perfectly on that.

Has anybody found a solution to this problem.

Any update on this matter would be highly appreciated.

Awaiting a kind prompt and positive reply

Thanks

Hi Everyone,

I had the same problem last night. I noticed the iPhone (iPhone 4, iOS 5.0) was taking a very long time to check for emails, so I rebooted the phone. When it came back on, I had 3 bars of signal but no carrier name by the signal bars. I tried calling my number, it rang, but the phone wasn't ringing. I then removed the sim card and put it into another phone which worked fine when called.

I believe this to be a problem with the iOS software as a restore of the iPhone seems to have resolved the issues... for now.

If anyone come across this problem, the only thing that seems to fix it is a factory restore of the iPhone.

Hope this helps.

Hi everybody,

I have similar problem, after 3 days restoring several times the problem is not solved. I got no service, searching, 1 dot signal level and tried to switch on and off airplane mode several times, sometime by chance it started to scan the carriers. What I noticed is the popup "NO SIM..." doesn't show up when I eject the SIM card, no change when I insert it. So it means the phone doesn't detect SIM removal or insert. I search Google and found out the 3 outer contacts are connected together for a short time for every SIM removal or insert, that tells the system about the state change. The copper strip accross the sim is GND and connected to 1 of the 3 outer contacts should touch the other 2 contacts for a split of a second to send the state change signal. By gently bending up these 3 contacts a little I got the "NO SIM..." popup back and did fix the problem.

Hi,

Having quite similar problems. My phone shows no service all the time and I can't receive or send messages or phone calls. No matter where I am it never connects and I've talked to Orange and all the advice they've given me hasn't worked. Another thing is, in the settings there is no carrier option like there should be. This ont started happening since I downloaded iOS5. If anyone has found a way to solve this please let me know? Or if anyone has had similar problems?

Hi,

Having the same problem here. Suddently the iPhone 4 losses the signal from the carrier and there is nothing I can do about it. I tried to go on airplain mode many times and turned off the iphone but nothing changes. If I take the SIM out the iPhone does not reconize there is no SIM while my SIM works fine in another iPhone. The problem is that

- I cannot make phone calls / send sms etc.

- If i try to make a phone call, the phone app blocks

- If somebody calls me the it seems like I'm available but my iphone does not ring at all

I went to the genius bar at the apple store and they did not what to do. They just changed me the iPhone gving me a new one.

Went back home and restored the iPhone from a back-up and THE PROBLEM WAS STILL THERE. This means its a software issue.

The only thing that worked was to restore the iPhone as new. All my contacts and calendars were restored thanks to iCloud. I resync my apps in the iPhone and everithing seemed to work fine. After few days THE PROBLEM SHOWED UP AGAIN!! I called Apple but they did not know what to do. THe told me to remove all the app and see if it solved the problem. nothing. I had to restore my iPhone as new again.

Now I'm running my iPhone with no apps. I think there is one app that cause the problem but i do not know which one.

Does anyone have solved this very frustrating issue. it seems there is no way out. I'm really ****** off.

please help!!!

Hello All. I live in Denmark and i have the same problem. I have some other experiences i want to share with you guys.

First of all, i bought the phone from a friend, who bought it from a tele-store about 2 years ago. So its not stolen. I bought the phone last year, and it worked like the first 1-2 weeks then it said No signal and "phone not allowed". I tried everything from changing sim, restoring, to replacing the phone parts. Nothing worked, so i gave up. I left it under my bed like 8-9 months and just realized 2 weeks ago that i had an iphone 3gs. So i charged the phone, inserted the sim: Searching... Searching... 1 bar (no carrier name)... 1 bar (TDC mobile) .... 4 bars TDC mobile.

I couldnt believe my eyes. Immidiatly i called my friend to see if it worked and it seemed to do so. I went to the phone store to buy some accesories(cases chargers etc.) and spend like 100$. Then i came home, and the signal was gone again, it went back to the same "NO SERVICE" state, and also settings->general->about->phone not allowed. I started crying and cutting myself, i began to talk with the iphone, i heard voices in my head and saw dead people. I freaked out. I thought maybe i just need to update the firmware to 5.0.1? so Thats what i did, i updated the firmware, it showed me the welcome screen (where you have to select the language etc.) and i inserted the sim, and it gave me "1 bar TDC mobile" and a "congratulations, your phone is activated" screen on itunes. I smiled and went through the welcome thing, and in the end i had to Agree on the terms and user agreement thing, so i clicked "i have read and agree on...... bla bla bla" and right when i clicked that, the phone went back to NO SIGNAL. I started laughing... It has depressed me so much, i think i got iphonephobia, i see iphones in my dreams.

If anyone, i dont care who it is, has found a solution for this, please contact me.

Ok people, I just managed to resolve my particular issue with the 'No service',

iphone>Settings>General>About>Network> not available "Phone not allowed"

Even if your phone is factory unlocked, (as is mine) you should contact your network provider, give them your IMEI number and confirm whether the phone is blocked. I travelled abroad (outside EU) and used a local sim card and since being back in the EU the issue of 'No service' occured.

If the phone is blocked, you would need to get your network provider to place an unblock request. Probably need to do the same unblock request process for the initially registered sim card. Once blocked, the blocking is effective across the EU (according to apple representative).

This should save you a trip to apple and getting a replacement, as well as the need to order a new sim card.

I hope this saves someone some time as I wasted heaps of time trying to resolve this issue.

In the future, wherever you are, whenever you place a new sim card into your iphone, you need to factory restore the phone with the new sim card inside the iphone (so I am told by apple...) Factory unlocked isn't so unlocked as it sounds... but I guess it does allow the phone to accept other networks... however tedious the required process to prevent the phone and sim from being blocked by your network.....

PS. If you are not connected to itunes and you want to know your IMEI number, dial *#06# on your iphone.