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I am having an issue with the Messages app on iOS 7.0.4 (11B554a) whereby on conversations that were previously all SMS and the other person purchases an iPhone, Messages reverts from sending iMessages to SMS seemingly at random.

I have tried:

  1. Disabling/re-enabling iMessages in the Settings app (temporary fix)
  2. Killing Messages from the multitasking view (temporary fix)
  3. Disabling the "Send as SMS" option in Messages settings (does not work)

Has anyone else experienced this or know of a possible solution? I am considering using a third party tool like iExplorer to export all of my conversations and starting fresh, but I really view it as a last resort since some of these conversations have been with me since the launch of the original iPhone in 2007.

Edit 1: I should point out that these are not failures to send an iMessage that results in a fallback to SMS, rather I notice as I'm composing the message that the text entry box has the subtle "Text Message" on it and the Send button is green. I perform steps #1 or #2 (typically #2) and the iMessage is sent and received just fine.

Edit 2: Further investigation has shown that when the Messages app isn't used for a long period or is suspended due to a using resource intensive app (like a 3D game), this behavior will occur -- the Messages app will show messages to the one person who I used to contact with SMS has reverted to SMS again while everyone else still shows as being iMessage capable so I don't believe my connection Apple's servers is the issue. Again, simply killing the Messages app from the multitasking view shows everyone is capable of iMessage again and iMessages are sent and received properly.

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1 Answer 1

up vote 0 down vote accepted

iMessage is essentially an Apple operated Instant Messenger service deployed to compete with, or augment, SMS and MMS.

iOS will use iMessage to deliver a message if there is a data connection available to Apple's servers and both the sender and recipient are known by Apple to have iMessage configured for their respective addresses.

Most likely if a person you regularly iMessage with is now sometimes receiving as SMS it is due to intermittent data connection (ie you are mobile and data service is failing). Otherwise it could be an Apple iMessage server issue - seems to crop up regularly.

Furthermore in the last three weeks several of my friends and family have reported issues with iMessage so possibly there is something deeper and worse going on with iMessage servers.

cheers

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Thank you for your response. I've clarified my question a bit, so please see Edit 1. –  Noren Jan 27 at 20:55
    
Same answer :) If your device is unable to reach Apple's servers for some reason it will fall back to text mode (thus you see the hints at how delivery will be attempted). It's not even showing you the blue b/c iMessage is not currently an option. I am still assuming that you frequently succeed with iMessage with the person(s) and are asking about seemingly random occasions where it appears to default to use SMS/MMS rather than iMessage. –  Ram Jan 27 at 22:21
    
Thank you, again, for your response. I understand your explanation and I agree it is correct, however in this case I am leaning toward the underlying backing store for the Messages app as being to blame. I've had the same type of issue with syncing music where a certain song would not sync until I removed everything and started from scratch and it's worked fine since. As a programmer myself it's a frustrating experience, but one I can understand the cause of technically. I hope Apple's next release of iOS is a Snow Leopard style bugfix release because it is sorely needed. –  Noren Jan 28 at 14:34

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