MMS settings for Samsung Galaxy S4 on O2 PAYG

[Anonymous]

I am trying to set my wife's Samsung Galaxy S4 up to send MMS. It can receive MMS fine, but every time I try to send an image I get an error saying "Error network problem".
I've tried texting ACTIVE to 2020 and installed those settings, but to no avail.
Why can I receive but not send?
She has enough credit, so it's not that.

[MI5]

The settings I was referring to are from the menu button within the Messaging app.

[Cleoriff]

Have you tried this.?...

O2 pay as you go MMS settings
■Name : O2 MMS
■APN : wap.o2.co.uk
■Proxy : http://wap.o2.co.uk
■Port : 9201
■Username : o2wap
■Password : password
■Server : http://mmsc.mms.o2.co.uk:8002
■MMSC : http://mmsc.mms.o2.co.uk:8002
■MMS Proxy : 193.113.200.195
■MMS Port : 8080
■MMS Protocol : WAP 2.0
■MCC : 234
■MNC : 10
■Authentication Type : <Not Set>
■APN Type : mms
■Press ‘Menu’
■Tap ‘Save’

O2 pay as you go Wap Settings
■Name : O2 Pay and Go
■APN : payandgo.o2.co.uk
■Proxy : 193.113.200.195
■Port : 8080
■Username : payandgo
■Password : password
■Server : <Not Set>
■MMSC : http://mmsc.mms.o2.co.uk
■MMS Proxy : 193.113.200.195
■MMS Port : 8080
■MMS Protocol : 2.0
■MCC : 234
■MNC : 10
■Authentication Type : <Not Set>
■APN Type : *
■Press ‘Menu’
■Tap ‘Save’

just edited to say this info was included in the link MI5 provided yesterday...Doh...

[Anonymous]

Thanks, I've copied these in to a new APN. Where do I activate the APN? How do I use it for MMS?

[MI5]

You can't. The S4 uses a combined mms apn but that isn't your problem.