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Sim

I had the exact same issues resetting network settings or hard resetting the iPhone didn't work so I removed the SIM card from the iPhone waited two minutes and reinserted it problem is gone iMessage is working 100%.
 
Better idea would be each iphone use the same ApppleID and only turn on Find My iPhone service on that account. Then each person have own appleID they use with the other services and imessage and facetime.

Not unless that change under iOS7 (and it could have, I'm still on JB). With iOS 6 you can't do it that way. To see all devices on one FindMyIphone map, they have to be on a common iCloud ID.
 
ah wasnt just me then :)

switching of imessage, deleting conversation where I had problem and restarting phone and switching on imessage again fixed it for me
 
Better idea would be each iphone use the same ApppleID and only turn on Find My iPhone service on that account. Then each person have own appleID they use with the other services and imessage and facetime.

in iOS7 only the main iCloud account can have access to the f"ind my phone" feature. Prior, you were able to use "find my phone" with any/multiple icloud accounts added to the device. Thus, I was able to see all family members devices from one screen. Not anymore. PITA to check on the kids are from time to time.

I have also noticed that "find my phone" wasn't working initially on other devices, even though the setting was activated. Once I accessed the settings page it worked right away. Might be due to having multiple accounts previously. Don't know.
 
Awesome! Since I've bought the 5s, I've been unable to start threads from my mobile number.

It now works. WOO!
 
in iOS7 only the main iCloud account can have access to the f"ind my phone" feature. Prior, you were able to use "find my phone" with any/multiple icloud accounts added to the device. Thus, I was able to see all family members devices from one screen. Not anymore. PITA to check on the kids are from time to time.

I have also noticed that "find my phone" wasn't working initially on other devices, even though the setting was activated. Once I accessed the settings page it worked right away. Might be due to having multiple accounts previously. Don't know.

You don't need to do this. Just set each phone with a separate iCloud acct, and install and turn on Apple's FindMyFriends on each phone. Then you can check on all your kids from one screen, the FindMyPhone screen.
 
Just got off a chat with apple support. The steps that solved my case was

1. turn imessage off
2. hold sleep & home button until you see apple logo
3. turn imessage on

It's not solved for me.. for a while at least. and then you don't have to worry about resetting your network settings and losing access to previously connected wifi spots.

I'm sorry to hear it didn't work. This is what I suggested a couple of friends who were having issues do. Though I had them power down normally via swiping the red bar, and reboot normally.

It worked for all of them. This is definitely the least invasive thing to try first.
 
I had this issue yesterday, as did two of my friends. Turning iMessages off, restarting and turning them back on fixed the issue for all of us. I stand by my statement that iOS 7 needed 2-3 more beta releases before going public. I used all the betas and still felt work was needed and still is.
 
Hanging happened to me.
Too bad Blackberry can't get its BBM out to iOS users during this outage. They had yet another window that they missed.
 
Facetime and iMessage use both a Server Token and Device token. Erasing device and restoring from backup resets the device token and resetting your appleID password resets the server token.

The problem I had was that *ALL* of my devices were doing it. So yes, changing the password changes all the tokens which is why it fixed it for me.

A restore would NOT have fixed it for me.
 
I had this issue yesterday, as did two of my friends. Turning iMessages off, restarting and turning them back on fixed the issue for all of us. I stand by my statement that iOS 7 needed 2-3 more beta releases before going public. I used all the betas and still felt work was needed and still is.

That's the problem with timing it to a hardware release. Plan to release the GM well before a hardware release and then you can delay it, if necessary, with more beta testing.
 
Not unless that change under iOS7 (and it could have, I'm still on JB). With iOS 6 you can't do it that way. To see all devices on one FindMyIphone map, they have to be on a common iCloud ID.

iOS6 and iOS7 BOTH allow this. You will use a common appleID on all device JUST for the find my iphone service. Then create new appleID for each person and they can use that appleID for all other icloud, imessage facetime services.
 
Just so the "restarting worked for me" people know; the issue will come back within a few hours. Watch. That is not a permanent solution. I have hard restarted at least a dozen times in the last 24 hours and it keeps coming back every few hours. I just tried the network settings reset, which I was trying to avoid, but I am pretty sure that it's going to come back after that too...
 
VOIP Apps

If you use an app that lets you receive regular SMS and phone calls over wifi/data (such as O2's TU GO in the UK) that can cause problems

When activating iMessage, I think Apple send an SMS to verify ownership of the number. If one of those apps is intercepting all incoming SMSs to also send over Wifi to the app then it causes problems...

I went in and completely deleted my TU GO account and all worked for me from then on...
 
Restaring iPhone works... but only for a while. After some time I have the same issue with iMessage not sending messages. I have to reboot it again. It looks like an issue with software not with cached settings. Btw. Siri also is not available very often. And it's for sure not the problem with my network cuz I'm a damn network engineer I know how my network works.

Greg
 
Have had to go through the reset instructions twice over the weekend already, but it does work. But the problem did come back for me after about a day.

Hope Apple can address this real quick. Not falling back to text messaging is a real PITA and major inconvenience. Less tech savvy users who wouldn't know about Mac Rumors or online help forums are probably freaking out right now.
 
Resetting Network Settings May Fix iMessages Not Working in iOS 7

Two iPhone 5's (not 5s) on 7.0.2 and started having problems over the weekend. Failed iMessages are not reverting to SMS which is on. I did the reset network settings on both, and hope it's fixed. If not will be turning iMessages off until I hear it is. Have unlimited texts anyways.
 
Did a restart and it fixed it for a day.

Then iMessage stopped working again, tried solution in the thread. We will see how long iMessage works for this time.
 
My iMessages have been working fine on my iPhone 5 with iOS7. But, my wife has been have lots of problems with her iMessages on her iPhone 5 with iOS7. And hers will not resend as text messages either.

I just reset her network and that seemed to help. Although the old messages that failed to send had to be resent again.
 
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