Why cant I log into mumsnet on my phone?

[rainbowinthesky]

I cant open the log in page so cant post or change the style.

Various possibilities, including

The phone isn't supporting or is blocking a pop-up window.

The phone isn't accepting the 'cookie'
The phone isn't processing javascript as desired.

Not quite sure how mumsnet does the login but I expect it uses possibly all 3 of the above.

I find that the browser my phone came with, does not keep me logged in to mumsnet.

I find that Opera Mini m.opera.com does work.

So one thing to try is to install a new browser on your phone - just for Mumsnetting!