Help MMS Message from IPhone comes with a 6 in front of the phone number

[SinghFam]

My wife has an iPhone Xr - any time I receive an MMS message from her and it's a new group on my phone, it comes with a 6 prepended to her phone number. If I respond to the group - she does not get the message.
Her SMS messages to me directly have always been fine - this is just her MMS messages.
If I started the group - everything works fine. Has anyone else ran into this? I do not have this problem with any other incoming messages - just hers.

 

[ocnbrze]

tell her to get an android phone instead.....lol

iphone and android has always been inconsistent with text messages especially with mms. i never owned any crapple products so i can't help too much. have you checked her text message settings? there is some setting having to do with mms on iphones, but i forget.