SMS and MMS Messaging

[DSH]

I am experiencing problems sending SMS and MMS messages. I can send to some mobiles but not others. Why

[pgn]

A quick search would have got you here, @DSH - see if it helps?

https://community.o2.co.uk/t5/New-to-O2/Sharing-contacts-on-text-don-t-sned/m-p/1633639/highlight/tr...