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Settings > Phone > My Number > Unknown

Updated wife's iPhone 4 to iOS 5.0.1 and


Settings > Phone > My Number

shows UNKNOWN.


I assume this prevents imessages and sms messages from working because they are not going through, unless she has wifi signal.

She does not have 3g service so if she wanted to send an iMessaage without wifi signal, the phone should automatically switch to sms... and it doesn't.

All messaging settings are on: iMesages and Send as SMS.


I tried my sim from my iPhone 4 on 5.0.1 on her phone and get UNKNOWN number as well.

Tried her sim on my phone and her number shows. So it's definitely an issue with her phone.


Any ideas how to fix this.

Posted on Feb 7, 2012 5:26 PM

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Posted on Jul 21, 2017 4:05 AM

hey there.. i had the same issue.. and turns out it was sim Fault not a bug in iOS... make sure you have enough credit in your sim Card for that to work.. means 1$ .. 1- Restart iPhone 2- Settings -> Messages -> Turn iMessage On 3- wait 3-5 minutes .. depends on your internet conenction and load on Apple servers// 4- your number would automatically be in Phone

29 replies
Question marked as Best reply

Jul 21, 2017 4:05 AM in response to k8ella3

hey there.. i had the same issue.. and turns out it was sim Fault not a bug in iOS... make sure you have enough credit in your sim Card for that to work.. means 1$ .. 1- Restart iPhone 2- Settings -> Messages -> Turn iMessage On 3- wait 3-5 minutes .. depends on your internet conenction and load on Apple servers// 4- your number would automatically be in Phone

Mar 4, 2012 12:02 AM in response to allanes5

Hey guys I had the same problem and there is such a simple fix to it.


1. Turn on Airplane Mode - You will notice that you can not access your phone settings while airplane mode is on.

2. Turn off Airplane Mode and Immediately go to your phone settings and click on the unknown number tab and you will be able to manually enter your number. After this you should also get a message from imessage saying that you might be charged some amout or something like that. Say okay and you are all set to go. Hopefully this helps for regular messaging also, my regualr messaging was already working only imessage was going through my email and not as my no. Enjoy!!!

Dec 5, 2012 5:58 PM in response to allanes5

After switching from ATT to T-Mobile I had the same problem. I was told it has to do with the number being ported and that it would take at least 24 hours. Then I tried all kinds of remedies like turning iMessage on and off, resetting network settings and so on. Nothing worked and as a result MMS did not work. Today I simply took the SIM card out while the phone was on and about 15 seconds later put it back in. The number immediately showed and all is fine now.

Mar 12, 2013 10:56 AM in response to allanes5

Hey people this is what greatlt helped me.
" As far as the number being shown "UNKNOWN" was there, i pulled out my sim card for about 20 seconds and then put it in again. It promptly showed my number in the settings>phone>my number.
NOW activating imessage and facetime was quite frustrating, it kept on saying to wait and showing error some times. What i did was made a call from my iphone to someone and then clicked on Facetime. It said ' Activating " on the Call screen. Then facetime was there working. I want to Settings>Messages,,,it also activated my iMessages. Now both are working smoothly. I hope it may help you if you encounter any problem regarding it. 🙂 😉
Stay blessed.!!!

Mar 12, 2013 10:57 AM in response to kvs008

Hey people this is what greatlt helped me.

" As far as the number being shown "UNKNOWN" was there, i pulled out my sim card for about 20 seconds and then put it in again. It promptly showed my number in the settings>phone>my number.

NOW activating imessage and facetime was quite frustrating, it kept on saying to wait and showing error some times. What i did was made a call from my iphone to someone and then clicked on Facetime. It said ' Activating " on the Call screen. Then facetime was there working. I want to Settings>Messages,,,it also activated my iMessages. Now both are working smoothly. I hope it may help you if you encounter any problem regarding it. 🙂😉

Stay blessed.!!!

Mar 12, 2013 10:57 AM in response to Julio_Enrique

Hey people this is what greatlt helped me.

" As far as the number being shown "UNKNOWN" was there, i pulled out my sim card for about 20 seconds and then put it in again. It promptly showed my number in the settings>phone>my number.

NOW activating imessage and facetime was quite frustrating, it kept on saying to wait and showing error some times. What i did was made a call from my iphone to someone and then clicked on Facetime. It said ' Activating " on the Call screen. Then facetime was there working. I want to Settings>Messages,,,it also activated my iMessages. Now both are working smoothly. I hope it may help you if you encounter any problem regarding it. 🙂😉

Stay blessed.!!!

Settings > Phone > My Number > Unknown

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