pidgin ( yahoo ) works fine for me.
so does 3G calls over skype.

Im on T-Mobile.

T- Mobile block MSN WTF. hmmm i was going to wait out for n900 to be back on t mobile, as heard they do better with data usage but **** that for a laugh if i cant even use msn

I have been lurking around the T-Mobile support forums and it seems some users can use live messenger on other phones.

It would suggest that it's the way N900 uses msn on the T-Mobile is the issue?

I'm soo glad that I'm not the only one with this problem, I was convinced I had a defective phone!
The chat protocols (for both Haze and Pidgin) I use works flawlessly via my home wifi connection,
but via 3G, MSN won't connect, Yahoo will stay connected for the most part and Skype is always on.

And yeah, to reiterate others, I tested an O2 sim, and MSN connects fine so I definitely suspected
some sort of blockage on the T-Mobile side - I just didn't know that was possible (or necessary!).

Can anyone with a Three sim confirm MSN connects there as I'm seriously considering moving over.

Just tried it myself yeah it seems they do block msn. Has anyone rang them (T Mobile) about why they do this

its in the PaYG contract so dint see the point.

what the difference between msn and google talk.

im assuming there the same but you cant talk between systems

id ring them myself but stuck at work

Sorry I know this is not good solution but have you tried www.meboo.com
I dont think they can block any ports from that(but the could block the web page i suppose)

but its working on my n900 right now on wnw.
I dont use msn so dont know what features you'll be missing,
and was found on a google search after reading your post,

so I have only tried for 10mins on a dormant account to test.

hope it'll do for now.
cheers

P.s remember you'll be going through a thrid party...

Update:

I rung 4 times today got 4 different people and all of them didn't really know what to do. The UK call center lady was very nice and said they she saw no reason for messenger to be blocked.

However if you sign up to a jabber service that has the msn transport gateway you can use the nokia jabber client and it works.

So I now have msn working on T-Mob UK 3G via Jabber.

I had to use a Jabber desktop client to discover the msn service but once that was done it was pretty straight forward.

One note though, I'm not sure if it a bug or the jabber service I signed up to but if you switch from wifi to 3g and visa-versa you get an authentication error.

Going back into the account and re saving it sorts it though.

Hope this helps

I used a Three UK PAYG and seemed to connect fine