The 5800 utilized a , which required a firm press or the use of a stylus/plectrum rather than the light tap of modern capacitive screens. Nokia 5800 Xpress Music (Unlocked) review - CNET

: Because the OS was new, third-party software optimized for touch was initially scarce. Users often relied on SISX files or Java midlets .

: Widely considered the best Twitter client for Symbian.