IPhone constantly displaying "no service" although good serivice is available

iPhone is displaying "No Service" constantly although in an area of good service so I am unable to call or text.
How do I get the phone to recognise service again so the phone can be used?

Hi, thank you. This still has made no improvement so will be contacting my service provider tomorrow.
Thanks.

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Have upgraded to Iphone 4s, have inserted the microsim but mobile constantly displaying no service. Do I need to do anything to activate the sim? Thanks in advance.

Have upgraded to Iphone 4s, have inserted the microsim but mobile constantly displaying no service. Do I need to do anything to activate the sim? Thanks in advance.

Haven't connected to itunes as of yet, just followed the set up on the phone. Is this the problem?

TS4148 iPhone 4S displays 'No Service' or 'No SIM Card Installed' with iOS 5.1.1 (9B206).

iPhone 4S displays 'No Service' or 'No SIM Card Installed' with iOS 5.1.1 (9B206).
I have just started getting theihs issue the last couple of days where I am having the turn my phone off and on about 4 to 5 times a day. I have looked on the available posts and seen that this is a known issue on iOS 5.0.0 but was fixed for iOS 5.0.1. I have got iOS 5.1.1 (9B206).
Is anyone else having this issue or knows how to fix?

i used to get that , but i simply took out the sim card , dusted it and the sim tray and put it back in , and now i dont get it
maybe the sim isnt positioned correctly , just my two cents
hope this fixes it for you

I've just got an iphone 4, with a new sim - although iam keeping the same number, my iphone keeps displaying no service??

ive just got an iphone and new sim, im keeping my old number, ive registered my iphone on my p.c but my old phone and number is still active, whilst my iphone keeps displaying a "no service" where the signal bars should be. I think there is a problem with the sim - does anyone know for sure??

Sounds like your new sim is not activated. Call your carrier, they will need the sim number on your new sim. It's a 20 digit number on the back of the sim.

Iphone 3gs displaying NO SERVICE

i have a iphone 3gs and recently damaged the lcd and digitizer so had them replaced..not through apple. when i picked up the phone all was in good working order. by the time i got home the phone was saying NO SERVICE. and hasnt picked up any since?? ive tried loads of trouble shooting techniques i.e turning airplane mode on n off...removing sim whilst doing this...completley restoring the phone through itunes...updadting software...reseting all and network setting on the phone itself. i have also turned phone off then back on and it will search for networks then 'waiting for activation' is displayed. i really am at a loss as how to fix this problem!! can anyone please help?? (network-orange)

I would take it back to the place that repaired it and have them address the issue. They may not have connected everything properly.

Iphone 3gs displaying no service message

I replaced my old iphone 3gs by a new iphone 4s. After 2 weeks the new iphone was stolen but, when i tried to go back to my old iphone 3gs (with a new sim card), it kept displaying a "no service" message after I updated it to ios 5.1. I got back all the information stored in iCloud and iTunes and all the applications work fine, except for the telephone service. I tried changing different sim cards (including different telephone lines) but the problem remains. The phone worked perfectly well before this incident started. Help!

I forgot to say that I tried restoring the device many times, but couldnt fix it. Any ideas? Searching the apple site,
I saw an article explaining something about "udating carrier settings" http://support.apple.com/kb/TS4148
I dont have such option in my general settings

O2UK: Why is my iPhone constantly picking up service, and then saying 'No Service' or 'Searching'?!

My iPhone 3GS searches for signal, gets some signal then it drops out and says no-service and then starts searching again.. it worked fine yesterday.. and this morning only since i got to work has it stopped. I've even walked down to the local shop to try and get signal so its not the building i'm in. My partner has the same phone with the same carrier (O2) and has no problem.
I am on O2 Simplicity, just upgraded from a blackberry.. at this rate looks like im going to have to go back to it beacuse i cannot use this phone like this..
I will go to the applestore tomorrow.

Maybe you are currently in an area of low signal? Or inside a thick-walled building?
In my work office my phone does this as they have some tin-foil type insulation which the phone signals can't penetrate well.

IPhone 4S displays 'No Service' or 'No SIM Card Installed' version 9A406 does not fix it

APPLE´S SOLUTION LISTED DOES NOT WORK.
THE STATE THAT AFTER RESTORING PHONE IN UPDATED ITUNES, PHONE WILL GET A NEW VERSION THAT WILL ELIMINATE THE NO SERVICE AND NO SIM CARD INSTALLED.
BUT AFTER DOING IT 5 TIMES, CHANGING SIM CARD 2 TIMES AND STILL SAME ISSUE.
HOPE TO HEAR SOON FROM APPLE. A LOT OF SILENCE.
AND STILL A LONG WAY TILL THE PROBABLE IOS UPDATE ON MARCH 9TH. AND ONLY HOPING IR WILL REALLY FIX IT.
IF NOT, THIS IS A USELESS PHONE AND ONLY AN ITOUCH.
MANY PEOPLE WITH THIS PROBLEM.
HELP PLEASE.

You are right. Sorry gdgmacguy. I did not mean to appear yelling. My bad.
This is my correct message.
Apple's solution listed does not work.
Apple state that after restoring your iphone 4s with the new version, it will fix the problem.
But after reading many other posts like mine, and trying it myself 5 times, the problem does persist.
Hope to see a real solution from Apple soon. Hopefully in ios 5.1
Cheers.

Iphone 3gs displays no service and cannot activate

I cannot afford a smartphone, so my friend has given me his old iPhone 3GS when he upgraded to a newer model.
the phone has obviously been wiped so that it's as if it just came out the factory.
I enter the language, WiFi network info, etc. have also tried multiple WiFi hotspots, including my home Netgear/AOL, parents Huawei/TalkTalk and a pub's technicolor/plusnet.
whenever i try to activate it, the top bar says "Searching..." and then eventually "no service", and i get a message saying the activation server is unavailable, and have tried again and again to no avail. have tried powering off, removing and re-inserting the SIM, then powering up - same errors. the SIM pins appear all present and not broken/bent etc when I look into the device.
All I can say about the make/model is that it's an iPhone A1303, so it's a 3GS (Identify your iPhone model - Apple Support) . 16GB capacity.
I have no way of knowing the iOS version, IMEI or baseband revision (unless there's a mac/iTunes way of getting it?)
my friend is certain that he has never jailbroken the device, and that it has always been on O2 (the same network as me).
my SIM works in my old Nokia, receives texts/calls etc. my Nokia gets all 4 bars of signal.
I have also been in to visit an O2 shop, and had my tariff upgraded to one for a smartphone. They're certain it's not an O2 problem. I've probably had this SIM at least 8 years.
Have tried activating it by itself, and via iTunes 10.6.3(25) on Mac 10.6.8. iTunes says there is no SIM installed.
is the phone somehow blocked? how would i find out if it was? is it possible that it has been hacked to support O2 instead of another network (by a shop) - and that by scrubbing the data, it has wiped out the hack (in which case, how do i get the phone's ios/baseband/IMEI/original network)? is this a really silly thing like having to deactivate my old phone or having to register the iPhone with O2? is this a problem with the SIM, the phone hardware, the firmware or iOS? what if i got his old SIM - would that activate the phone, and is the phone just not accepting a different SIM than the original one?

Here's what you do
1.Make sure your phone is not plugged into the computer.
2. Put the iPhone into recovery mode (this is NOT DFU mode). Do this by
     a). Hold down both the power/sleep button and the home button until the screen turns black/off
     b). As soon as this happens release the power button but NOT the home button
     c). If done correctly then the Apple logo will appear, KEEP HOLDING THE HOME BUTTON and eventually a connect to itunes graphic will appear. You can release the home button
3. With the connect to itunes graphic on the screen, plug your phone into the computer. iTunes will start up if it is not already on, and then will say the phone needs restoring. Ignore this and COMPLETELY quit iTunes.
4. With iTunes off and the graphic still on the phone screen, hold down both the power/sleep and the home button again for 9 seconds (count 100, 200, 300...) or until the screen goes black
5. When the screen goes black release the home button straight away.
6. It will start up with the iPhone activation screen ignore this. iTunes should have started up, if not do so. Go to the iPhone tab and either resotre from backup or set up as a new phone.
You're welcome

Iphone 4 displays no service after updating to iOS5.1 in March

I updated my iPhone 4 to the iOS 5.1 software and now I have no service anywhere. I have restored & gotten a new sim-card. This has been since March 11th.

so have you brought your phone to Apple for evaluation?

IPHONE CONSTANTLY SHOWING NO SERVICE/SEARCHING

Hello All,
i would like some desperate help and would be so grateful.
My iphone, after updating to ios7.1.1 now just shows no service/ searching.
I have tried everything listed below:
restore to factory settings
manual enter settings
restore network settings
none of this works and i am getting more and more frustrated!
I would be so grateful with all your help.
Please Help me

Hello aadil_93,
Thank you for contacting Apple Support Communities.
It appears you have done a number of the suggestions in the following article, but there appear to be additional steps there that you may want to persue.
iPhone: Troubleshooting No Service
http://support.apple.com/kb/TS4429
Regards,
Jeff D.

My Iphone 4 displays "no service" message in top right hand corner!

My Iphone wont pick up reception in areas where others will, it randomly picks up signals in some parts of my school and some streets in my town but it will still only have 1 bar and will only be there for about 30 seconds! I bought the Iphone off Ebay and it says it was unlocked, even if it was locked it says in settings>general>about it says that its carrier is Optus 13.1 and I am trying to use my Amaysim sim card which I am pretty sure runs through optus!

well i did yes, but i fear i made a mistake. Under the heading for 'iPhone Number' i mistakingly left in the sample number that was there...is there a way to like unregister the phone and start the whole process from scratch?...

IPhone 4S displays 'No Service' or 'No SIM Card Installed' Show Details

I'm sorry to ignorance, but TO UPGRADE MY IPHONE 4 16 GB, it updates and gone gone VARIOUS ESSENTIAL APPS OF MY MACHINE, I'M NO CAMERA, NO APP STORE WITHOUT ALL MY APPLICATION DOWNLOADED OVER 2 YEARS.
So I'm very Despont, THOUGHT MY ACCOUNT CONTAINED ALL MY APPS AND OTHER DATA, I never imagined it would disappear and would be without them.
GRATEFUL

You are right. Sorry gdgmacguy. I did not mean to appear yelling. My bad.
This is my correct message.
Apple's solution listed does not work.
Apple state that after restoring your iphone 4s with the new version, it will fix the problem.
But after reading many other posts like mine, and trying it myself 5 times, the problem does persist.
Hope to see a real solution from Apple soon. Hopefully in ios 5.1
Cheers.

My iPhone 4 displays "No Service" even after reboot, restore and changing the sim.

Title says it all, any help is greatly appreciated.

so have you brought your phone to Apple for evaluation?

Many of the times my Iphone 5s shows "No Service" in the specific network area, but if the same sim card is used with other mobiles in the same network area, it shows good network.. i did restore but still not working.. please help me..

My Iphone 5s shows "No Service" in the specific network area, but if the same sim card is used with other mobiles in the same network area, it shows good network.. i did restore,change sim card, reset all the settings but still not working... please help me..

Please do not double post a subject. Iphone 5S I answered your other thread.

IPhone constantly displaying "no service" although good serivice is available

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