The Nokia X5-01 is powered by Symbian 9.3 and runs on the S60 3rd edition user interface with Feature Pack 2.
The device uses the so-called Active Standby homescreen. It is available in several different flavors so you can prioritize the set of shortcuts you need on the screen.
The Basic layout just shows you the wallpaper (and the usual status indicators of course) and you can assign shortcuts to the D-pad directions.
The Vertical icon bar layout has four tabs - shortcuts, calendar, music player and personalization and it doesn't hide much of the wallpaper.
The other three layouts are more elaborate. They offer several rows of “homescreen applications” (e.g. upcoming events from the calendar, received emails and so on) along with shortcuts.
The Horizontal icon bar is the most basic of the three. You get a row of six customizable shortcuts at the top of the screen, below are email, calendar, Ovi Chat and WLAN notifications (they also act as shortcuts to their respective apps).
When the music player (or the radio) is on, a new row is displayed with the track info.
The Active layout is the good old Active Standby that was on the Nokia E71/E72 and others. It looks like the Horizontal layout, but tucks in an analog clock on the left of the screen and lets you customize what rows to appear under the shortcut toolbar.
There are numerous options to choose from (e.g. missed calls, voice mail, to-dos and so on). You could turn them all on, but only five slots are visible at a time and you can’t scroll up and down to see the rest.
The Active layout features two modes – Business and Personal, which have been borrowed from the E series. They allow you to quickly switch between two sets of shortcuts and homescreen apps – one with business apps at hand, the other, say, with Twitter and Facebook shortcuts.
The other option is the Contact bar layout, which has been available on Nokia handsets for quite a while too. It puts a row of favorite contacts on top the three homescreen applications - Calendar, WLAN wizard, Ovi Contacts – along with the usual six customizable shortcuts (this time at the bottom).
The Favorite contacts are placed on top, each represented by the contact photo and their first name. Four contacts are visible at a time and you can scroll left and right for the rest. The music player traditionally has a tab for the homescreen – but because space is limited, it usually ends up replacing the Calendar tab.
There’s one final layout – the Talking theme. It enhances accessibility by reading out loud the option you’ve selected.
As with all Symbian phones, there is a built-in voice recognition system. It does a good job, being fully speaker-independent.
The Symbian task manager appears on every pop-up menu. It's actually placed on top of every list, which can be a little irritating at times, considering you can still invoke it with the well-known shortcut of pressing and holding the Menu key (the one with the House pictogram).
The Nokia X5-01 is powered by a 600MHz CPU with 256MB RAM, which is plenty for a Symbian smartphone. The UI is speedy, the only lags we noticed concern some transition effects when going through the menus.