Sorry. I try to write that sentence better:

"The huge screen of the N800 has enough space to show a large phone dial. Why not to write a software that could make N800 able to phone this way?"

P.S. My English is not very well, so I have to use expressions like "x like y" to tell some ideas. When I wrote "like an iPhone" I intended "with a large touchscreen phone dial". I could say also "like the LG Prada phone", buy I think the iPhone is best known!

:-)