About spenish

Dear All...

I'd like to make a spanish text input software using 12 keys that is
similar
to a key pad of mobile phone.
Before to design my software, I wan't to know the multi-tap sequence used
on
spanish mobile phone.
I think, the most spanish mobile phones have a common sequence looks like
english multi-tap.
But, I don't know how to inut specific chracters used for only spanish
such as ÁÉÍÓÚÑÜáéíóúñü¿¡«»?
As my supposition, "á" can be inputed by pressing a key '2', through the
sequence "a->b->c->á".
And "á" aslo can be inputted by pressing key "2" and "*" (a->á).
But these are just my suppoisition. If you are using a spanish moblie
phone, please let me the multi-tap sequence.

Thank you...