blackberry user needs help

Hi folks, Are there any techie people out there who know about using blackberries (or brambles as we call em in yorkshire)? I'm fairly new to the forum and I can cope with everything taking ages to load and I'm getting used to looking at pages a bit at a time but I keep finding stuff I just can't do. So far - can't update my voice, can't join groups and can't change avatar pic (can't even load edit avatar page). I'd be really grateful if anyone can help even if only to confirm what can't be done without a PC (sadly I don't have access to one) so I can stop trying to do the impossible and get on with enjoying. the forum. Thanks in advance, Ness.
A garden is a thing of beauty and a job forever!