iPhone 4 constantly shows No Service

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iPhone 4 constantly shows No Service

My iPhone 4 with ios5.0.1 always show 'No Service'. Sometimes it happened once a day, but sometimes 5 times a day. What I did was that I enabled the 'Airplane' mode and disabled it again, I will then see full bar of reception but the carrier's name (in my case is Maxis) didn't appear. I was unable to make call/ receive call. When others call me, they heard the normal ring tone, however, my phone won't ring.

In order to get back the reception, I have to restart my phone.

Has anyone experienced it? I have tried googled, some said it could be due to firmware, some said it's hardware, some said it's carrier. Hope someone can advise.

iPhone 4, iOS 5.0.1

Posted on Nov 26, 2011 2:57 AM

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Answer 1

CuDaK

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Nov 26, 2011 3:18 AM in response to sparklesj

I have the same problem and at the moment I do not use the phone.

I really need answer what i must to do: Send iphone to service, wait for iOS update or what ?

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Answer 2

PauloSR

Level 1

5 points

Nov 26, 2011 4:13 AM in response to sparklesj

The same happens here (in Portugal) with my iPhone 4 since I upgrade to iOS 5... and the update for iOS 5.0.1 did not solve the problem...

After it loses the signal from the carrier, it is looking for the carrier signal indefinitely...

People call me, they hear the ringing tone, but I get no sign, no SMS, nothing...

To solve the problem I have to restart the phone...

Begins to be too frustrating...

There is no solution???

Sincerely,

Paulo

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Answer 3

CuDaK

Level 1

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Nov 26, 2011 4:56 AM in response to CuDaK

..... ONE MORE THINK, bug with no service and Siri only in three language its big mistake.

Sorry but i could buy Galaxy S2 and i think i will do that ;///

Too bad the money spent in AppStore.

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Answer 4

sparklesj Author

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Nov 29, 2011 12:59 AM in response to sparklesj

I called up the service provider, Maxis, to report the problem. They couldn't advise much but they reset my network settings from their end and I reset my phone's network settings too. Then, for 2 days, my phone had no downtime. But it happened again just now. Then I enabled and disabled Network > Cellular Data of my phone, then I got back the service.

Can anyone advise on what the root cause is? I have to check my phone constantly to make sure that it has reception, else i won't be able to receive calls.

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Answer 5

kian wei

Level 1

4 points

Dec 1, 2011 10:03 PM in response to sparklesj

Hi,

I am facing the same issue like you & the service provider Maxis advise to re-install the software. I did but the phone wr as working about 10 days then the problem happen again. I never knew that enable & disable network can help. What I did is do hard reset failed then proceed to factory reset then it works. Dont know what is the root cause. At least now I knew has this quick fix..

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Answer 6

sparklesj Author

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Dec 1, 2011 10:25 PM in response to sparklesj

I used to do a restart on the phone to get back the service but I was just trying my luck by enabling and disabling the Cellular Data and it happened to work. Not sure if it still works the next time it happens.

However, I can't find out the root cause of this (firmware / hardware / Maxis), and I have to check my phone every now and then to make sure that it has service.

As you can see, Maxis advised us differently. They advised you to re-install the software while they reset the network settings for me.

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Answer 7

kian wei

Level 1

4 points

Dec 2, 2011 1:02 AM in response to sparklesj

Yes I do agree Maxis also dont know what is happening. Pretty sure is software bug as before the upgrade the phone is working fine all time. Just to share how I discover the problem. I will turn on the airplane mode every night when go to sleep & off on the next morning. The problem occurred when the phone show no service when the airplane mode is turn off. I may chose not to turn on airplane mode now to see whether the problem will be re-occurring

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Answer 8

Dec 2, 2011 1:19 AM in response to sparklesj

you restore the view back

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Answer 9

sparklesj Author

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Dec 2, 2011 1:32 AM in response to sparklesj

Kian Wei, what is the version you are using? I'm using 5.0.1.

When I experienced 'No Service' previously, I would switched Airplane mode on, and I got full bar (without the Maxis sign) on my phone but still unable to call until I restarted my phone.

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Answer 10

sparklesj Author

Level 1

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Dec 2, 2011 1:36 AM in response to sparklesj

Nguyen, what do you mean by 'restore the view back'? How to restore?

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Answer 11

kian wei

Level 1

4 points

Dec 2, 2011 7:39 AM in response to sparklesj

I m using iOS 5.0.1 also. My scenario was when shown no service I hv to restart the phone and full bar with maxis appeared. At this point when called the other party phone will ring but I unable to hear any dial tone at all and also unable to end call. Further when other call me they will hear normal dial tone but my phone no response just idling. SMS also same system shown MSG no sent but actually is sent.pretty sure something running behind the scene as the % of battery drop drastically during this period of time

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Answer 12

sparklesj Author

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Dec 3, 2011 6:41 AM in response to sparklesj

It happened again today. And i realise it happens whenever it fails to connect to wifi. Like previously, i enabled and disabled the cellular data and it works.

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Answer 13

Yhyj

Level 1

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Dec 3, 2011 8:39 AM in response to sparklesj

Hi I also meet the problem same like urs. But when I turn cellular data just hv signal bar. Sometime got signal bar but no my maxis word. How? Need to send to center? Go apple or maxis? Dun know phone or sim hv problem.

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Answer 14

Yhyj

Level 1

0 points

Dec 3, 2011 8:41 AM in response to sparklesj

Same with u

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Answer 15

kian wei

Level 1

4 points

Dec 4, 2011 3:03 AM in response to sparklesj

Yes it happen to me today also. Same quick fix enable & disbale the cellular data. Concern of always no service problem & whether the updated software will fix this 😟

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