si lo so era per un regalo
http://www.google.it/imgres?imgurl=http://www.calmug.org/wp-content/uploads/2010/03/tastiera-per-iPhone.png&imgrefurl=http://www.calmug.org/2010/03/01/tastiera-fisica-per-iphone-da-apple/&usg=__JI2kDbfEX1R6Ytz9SVbytJk6NwY=&h=265&w=610&sz=35&hl=it&start=18&zoom=1&tbnid=j7WCQoA7VdbZGM:&tbnh=80&tbnw=185&ei=Hi6vTe-WMsTAswakiunhDA&prev=/search%3Fq%3Dtastiera%2Bfisica%2Bper%2Biphone%26hl%3Dit%26sa%3DX%26biw%3D1366%26bih%3D625%26gbv%3D2%26tbm%3Disch0%2C494&itbs=1&iact=hc&vpx=911&vpy=173&dur=2092&hovh=106&hovw=245&tx=110&ty=63&oei=Dy6vTd39EonZsgas5rHXDA&page=2&ndsp=18&ved=1t:429,r:4,s:18&biw=1366&bih=625
edit:
trovata http://store.apple.com/it/product/MC533T/A
ma funziona anche su iphone 4???