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kois
Level 1: Joiner
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Hello I've been facing this problem for a while now, The phones im using are iPhone 4S And iPhone 7. 

My problem is that whenever i put a O2 Sim card in it works fine until iMessage says failed to activate I've tried everything to getting a new sim new number to even factory reset on both devices with still fail! Please help

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MI5
Level 94: Supreme
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@kois 

Did you set the phone number in Settings >Phone >My Number?

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
Message 2 of 6
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lewys-gp
Community Manager
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Hi, @kois. Let us know if you resolve this issue, please 😃.

Community Manager for the O2 Community 🙂
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kois
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Yeah i read online that could be the problem but unfortunately it was not 

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kois
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Still not resolved it tried multiple times

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madasaf1sh
Level 66: Unequalled
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@kois 

 

It might be worth speaking to Apple Support, as if switching sims and phones it could be a backend issue on iMessage.

 

You can speak to them via the Apple Support website

Current Phone: Sony XPeria Pro-I and Motorola Razr 5G
I also have a Planet Computers Gemini

I work in IT as an Enterprise Messaging and Collaboration Tools Administrator (Office 365, Slack and much much more) and manage hardware both Mobile and Desktop / laptop, my desk is a bit like PC World

--
We are all customers and dont have access to any o2 accounts





Message 6 of 6
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