For "some reason" the word completion function on my windows mobile phone (HTC Diamond, rebadged as a T-Mobile MDA Compact IV (UK) running WM6.1 with HTC Touch Flo 3D) hasn't worked since one of my firends was taking a look at the phone (I remember him bitching about it being too obtrusive for him, as an iPhone fanboy).

I've checked all the obvious settings ( Start > Input > Word Completion ) and everything looks set there; I tried a hard reset, to no avail and even tried upgrading the ROM t the latest from my network provider. I even tried walking into the store where I bought the phone, and the staff couldn't fix the issue.

I still have my old handset, which also runs WM6.1 (a T-Mobile MDA Compact III (UK), albeit without Touch Flo 3D), and the word completion works on there, so I'm a little confused as to why I can't get it to work again on my new handset.

Can anybody identify why this might not be working, or help me fix it?

Edit: Even "Touch Input Settings" has both "Word Completion in T9 mode" and "Word Completion in ABC mode" checked. The full qwerty keyboard option is in T9 mode, and word completion works for this input method; It still does not work for my preferred, "Letter Recogniser" method.