How can one install Tamil fonts in mobile, if at all possible? Could
someone help me with details/requirements to view unicode sites in
cellphone?

I have LG C2500 (with a proprietary WAP browser). The browser is able
to displayunicode letters, the only problem is they are all displayed
as square boxes as it does not contain appropriate Tamil fonts to
render Tamil text. Should I switch over to some other Nokia series?

Krupa