w890i supports the 8GB M2 Cards??

[Chichaki]

according to this video on youtube it's possible: YouTube - w890i + 8GB M2

however it could be that your phone starts to run slow

I have the phone w890i and 8gb M2 truly works, however if you use a memory stick pro duo 8gb it might not work, for some odd reason..... also if you use the M2 it might be a little slow just like infinity said...
Happy using your 8gb mmc !