MMS

[Trex812]

Not sure if I'm posting in the right place but anyway...

I sent an MMS text to someone in my contact list today and they received the image and accompanying text that I sent them. However, this came from a totally unknown number that wasn't my own. My contact sent a reply back assuming I had a new number and got the response 'Who is this?'

This is very strange as I haven't changed my number and since then my text messages have been going through normally to this contact.

I did a live chat and got told this was impossible (quite patronising), so I rang O2 and the person helping me had no idea what I was talking about.

Anybody had a similar experience? Should I be worried about security? Or is this just a one time error that happens from time to time?

Would appreciate any answers.

Thanks!

[jonsie]

Obviously this shouldn't happen. Have you changed sim card at all? What phone do you have?

[Trex812]

Thanks for your reply.
I haven't changed my sim/number in years and I am using a Samsung Galaxy S8.
Very strange! First time this has happened.

[MI5 · Accepted solution]

I guess an old sim might give issues.
You can get a free replacement sim in any O2 shop, otherwise it will have to go down as an unexplained mystery!

[jonsie]

A mystery yes, I can't think of anything to cause this on the S8 which is why I asked if @Trex812 had changed sim card.

[MI5]

I can't think of any reason why it would happen either.

[Trex812]

Thank you, both of you.
I'm hoping it was just a one time error (maybe an issue with my service provider?) and no security has been compromised!
I will look into getting a replacement sim just to be sure!

[MI5]

Hope that sorts it for you but I certainly wouldn't worry about any security issues.