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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

76 replies

sparklesj Author

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Dec 4, 2011 6:19 AM in response to sparklesj

Yhyj, you can try to call Maxis and request them to reset your network settings. Then you reset your phone's network settings too. The next time it happens, you can try to enable and disable the cellular data. If it still doesn't work, I think you will have to restart your phone.

Does anyone know when will Apple release the next firmware? Some said it was supposed to be last week.

sparklesj Author

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Dec 5, 2011 6:54 AM in response to sparklesj

It happened again today, and it's worse as it didn't show 'No Service'. It was still showing full bar with Maxis sign so i wasn't even aware that my phone was out of service! When others called me, they could hear the ringing tone but my phone didn't ring. Constantly getting 'No Service' is already annoying, now it gets worse!!

kian wei

Level 1

4 points

Dec 5, 2011 7:28 AM in response to sparklesj

This is exactly what happen....How did you get the phone back in working order ? By the way did you observe the battery percentage drop a lot during this period of time ?

sparklesj Author

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Dec 5, 2011 7:42 AM in response to sparklesj

Ya, the same way, by enabling and disabling cellular data. No, i don't think my battery percentage drop drastically when that happened.

kian wei

Level 1

4 points

Dec 5, 2011 9:49 PM in response to sparklesj

Constantly no service is painful as now even with full bar also dont know whether the phone is in good condition...Did our voice been heard on this forum & somebody look into this ? I am afraid if this problem just affect small # of user they wont take action

sparklesj Author

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Dec 6, 2011 12:30 AM in response to sparklesj

I have no idea. And i think you are right. Only minority are experiencing this problem.

Do you happen to figure out what you do before it goes out of service? Could it be SIM card problem?

yhano

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Dec 6, 2011 12:09 PM in response to sparklesj

From Malaysia with telco Maxis..

Same thing happened after iphone4 OS update to 5.0.1.

Suspected that phone stays permanently in No Service mode after entering an elevator or bad service area.

Usually I won't find out until later! When others call, they'll hear ringing tone but the phone just stays idle..

Fix this by restarting the phone each time it's in No Service.
Restored to factory settings and update again once and the same **** is occuring..

Never jailbreak the phone..

Just hope it's fixed in next update...

sparklesj Author

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Dec 6, 2011 5:53 PM in response to sparklesj

Lately this happened without showing 'No Service'. It still show full bar with the Maxis sign, which is even worse. Has Maxis done something?

For those who have the same 'No Service' problem, do you always turn on your 3G and Cellular Data? I have a feeling that this won't happen to those who always have their cellular data enabled.

kian wei

Level 1

4 points

Dec 7, 2011 7:31 PM in response to sparklesj

just enable the airplane mode. dont think is sim problem as this thing happen after sofyware upgrade

kian wei

Level 1

4 points

Dec 7, 2011 7:41 PM in response to sparklesj

I do agree that for those who used to enable & disable the celluar data, the same probelm may be hide without their knowledge. So actually the affected population could be larger.

Your case of having probelm with full bar with maxis logo create bigger concerns of undetection of phone mulfunction. Just wonder whether constantly enable & disable the cellular data will be the temporary fix ???

sparklesj Author

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Dec 7, 2011 11:21 PM in response to sparklesj

Kian Wei, do you also have the cellular data turned off most of the time? Can you pls ask around, for those who are using ios5.01, and don't experience this 'No Service' issue, do they constantly have 'cellular data' enabled?

I have asked a few, some have cellular data enabled most of the time while some doesn't, but they don't experience this problem.

Is there any channel we can report this issue to Apple? So that they can investigate and fix this prob in the next version?

kian wei

Level 1

4 points

Dec 8, 2011 12:41 AM in response to sparklesj

Yes my cellular data is turned off most of the time. My finding is just like yours, they dont experience the same problem like me.

This should be the forum to raise the issue as I did see for some issue there were replies from Apple. I mean may be Apple choose to reply certain topics only based on the damage 😟

BenGUK

Level 1

0 points

Dec 8, 2011 2:49 PM in response to kian wei

Yes me too... I constantly have to restart my iPhone due to No Service ... When I do this I get full service again but with 2 hours it's lost service and I have to restart.... This is only since 5.0.1.... Come on Apple, please sort ASAP... I keep missing calls!!!!!!!!

sparklesj Author

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Dec 8, 2011 10:15 PM in response to sparklesj

Hi BenGUK, do you have your 'Cellular Data' disabled most of the time? If 'yes', the next time when you have 'No Service', can you try to enable and disable your cellular data to see if you can get back the signal?

rlai00

Level 1

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Dec 9, 2011 8:46 PM in response to sparklesj

same happened to me. I restarted almost 10 times but the problem exists. It's very annoying when I need to make an urgent phone call! Need a quick fix now!

iPhone 4 constantly shows No Service