Since migrating my mobile from TalkTalk some months ago, I get a text message very morning telling me my SIM card has been changed. They are apparently from my landline which is still with TalkTalk, so I've contacted them and they have no idea about it. Is there any possibility they are being generated by the O2 system?
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I can't see why these would be generated by O2? When a family member of mine changed to O2 from EE he certainly didn't get constant texts from O2 informing him his sim card had been changed.
The fact you are with Talk Talk for Broadband really points to them as the network sending the texts.
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I came to o2 from TalkTalk mobile I had mobile, BB and LLine all at the same time.
I still have Broadband & Landline with TT
Nothing like that happened to me when changing from TTmobile to O2mobile
Hope you get this sorted out soon.
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