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]

Have you got mobile data turned on?
Check settings against these here http://www.geeksquad.co.uk/articles/o2-apn-settings#o2%20Android%20APN%20MMS%20mobile%20internet%20s...

[perksie]

Wouldn't it be cheaper and easier to send pictures by email?

[Anonymous]

Yes, I did have Mobile Data turned on however I turned it off and back on and then selected another picture and it worked!
Thanks for the tip.
I'm not sure if there's a strict limit on the size of images you can send over MMS nowadays. I was trying a photo I took the other day and they failed, then one I took in 2010 (likely much smaller in size) worked.

[Anonymous]

Yes, but I wanted the MMS functionality working.

[MI5]

You can set a size for mms in message settings and the phone should resize them automatically.

[perksie]

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@Anonymous wrote:
Yes, I did have Mobile Data turned on however I turned it off and back on and then selected another picture and it worked!

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Glad you now have it working.

[Anonymous]

Any idea where those settings are? The handset is on Android Lollipop

[perksie]

Settings> Wireless & networks> More> Mobile networks> Access point names> O2 MMS

[Anonymous]

Thanks, the menus aren't exactly the same on Lollipop it would seem but I could find the AP settings. Nothing mentioned about file size though. I may need to phone O2 again 😞