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Caller Type: SMS

We got this text below today and we don't even have kids. We blocked it then reported the sms as junk, internet said don’t engage or reply as it will know you have an active mobile. It reads ; Hey mum, How are you, Save this temporary number since my phone is broken and it's not reading my sim card anymore so I had to get a new sim. Let me know if you got this message. ????