Could not sign in to iMessage

An error occurred during activation. Try again.

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Also on the iPhone we get:

iMessage Activation

An error occurred during activation. Try again.

With also:

Activation unsuccessful. Turn on iMessage to try again.

These show from Settings -> Messages -> Turn on iMessage

We have an iPhone in the office and we use it through the iMac by using FaceTime on the iMac and Messages.app on the iMac.

This worked well for a week. Then FaceTime stopped working. Now iMessage stopped working. Also, on the iPhone, messages stopped working, we see this on Settings -> Messages -> Enable. It produces the same error there when trying to enable.

We have tried these remedies:

  • Restart devices
  • Log out / log in Apple account, iCloud, Messages
  • Create new user account on iMac

None of these have resolved the issue. What should we try next?

1 Answer 1


I also suffered from the same and in the end contacted apple support who made me generate a support pin after logging into Apple ID and then did something on their end to resolve the issue. they said I sent messages to people not in my contacts.

but i still suggest checking if network provider blocks accessing iMessages.

  • Thank you for the help! Can you please advise which phone number you called? We are using the phone for business and yes we are texting confirmations to people. We are tying it in by hand, no automated or spam stuff. Dec 13, 2018 at 19:58
  • getsupport.apple.com 000 800 100 9009 these are the relevant contacts or places to visit. I recommend signing in to Apple ID(appleid.apple.com) and also to the support page I wrote above in order to save hassle. also serial numbers of any of the devices should be handy.
    – anki
    Dec 14, 2018 at 12:25

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