As usual, Nokia has taken great care to add as much additional value to the Lumia Windows Phones as possible given the constraints imposed by Microsoft. And since Microsoft doesn't really allow UI customizations, adding value translates to supplying exclusive apps and services.
Here is a quick demo video to get you started.
The Nokia Lumia 625 comes with the Amber update preinstalled but that doesn't change the user experience dramatically. It does add a few features like FM radio support and a new camera lens (more on that in a minute) but the rest is barely different from the previous WP8 iterations. Oddly, the Lumia 625 doesn't come with the so-called Glance Screen available with the Amber update that shows the clock and some notifications, while the phone is locked.
The lockscreen displays the current time and date and shows calendar events, emails and missed calls.
There's a reasonable level of flexibility and functionality to the lockscreen - the Live Apps service allows apps to display notifications and images. You can set one app to display big notifications ("detailed status") and up to five more apps to show less ("quick status").
The lockscreen wallpaper can also be controlled by apps - you can let the music player change the lockscreen image to the album art of the currently playing track or let one of the installed apps choose the image (e.g. Bing's beautiful background images or photos from your Facebook account).
The Modern UI is a vertical grid of Live tiles, which can be reordered the way you like. Almost anything can be pinned to the homescreen - apps, contacts, web pages and more.
Windows Phone 8 lets you resize the live tiles. Upon a tap and hold, you'll get an extra resize button, next to the unpin one. You can opt between quarter, normal and double size. If you select the smallest one though, the tile will be just a static icon (as is in the regular menu).
Most Live tiles display relevant info such as the current date, pending calendar events, missed calls, unread emails and more (third party apps do it, too). The Marketplace tile displays the number of updates available, while the Pictures tile is essentially a slideshow of your photos. It's nice to have all that info always available at-a-glance. You can look at them as homescreen widgets of sorts.
WP8 can do multitasking - well, not true multitasking, but more along the lines of iOS. Apps not in the foreground are suspended, but the OS has ways to take over and carry out the task for them (e.g. continue playing music). But just like Apple's iOS, if an app needs to run in the background (sat-nav apps, messengers, etc.) it can. The WP offers both kinds of multi-tasking and it's up to developers to choose how their apps behave.
To switch between apps, you press and hold the Back key. You'll get thumbnail snapshots of the apps, ordered chronologically left to right.
You can scroll the list horizontally to select an app and a tap will bring you back to your running or suspended app. You can't "kill" any of those apps from here - to exit one, you must bring it to front and use the Back key to close it.
If you keep on hitting the back key, you will effectively be closing all of the open apps one by one, which is very unnatural, especially when you've got an open Internet Explorer, which has to go all the way back to the first loaded page before it closes. Overall, it's best to let the OS manage the apps and not worry about which ones are opened or closed.
Opening the settings menu displays two sets of options: like on the start screen, you can swipe between System and Applications. System covers all the settings you can think of like sounds, color theme, Wi-Fi, Bluetooth, Accounts, etc. The Application settings let you configure each app you have on the device.
We would've liked to see some kind of quick toggles in Windows Phone 8 to spare you the need to go all the way to the settings menu to enable Wi-Fi, Bluetooth, GPS and the likes.
Another feature we feel is missing is a place where you can see all of your notifications from various apps. Live tiles manage to show notifications from each app to some extent, but they don't really have enough room for things like e-mail subject and such, while Android and iOS notification areas do. Microsoft has confirmed that it's working on just such a feature and that we should see it in a future update to WP 8.
Being a WP8 handset, the Nokia Lumia 625 also supports voice commands - you can dictate or have the phone read text out, you can initiate searches and so on. Unfortunately, the Windows assistant is still far behind the competition as far as recognition speed and accuracy are concerned. Luckily Microsoft is working on Cortana virtual assistant that should premiere with WP8.1 in the US in early 2014 and the rest of the world in 44 languages before 2014 ends.
The Lumia 625 also comes with the Data Sense app, which shows you the amount of data you've used. Both cellular and Wi-Fi traffic is accounted for. There are different data limit types: one-time, monthly and unlimited. The first two accept custom bandwidth limit values, while the latter is applicable if you have an unlimited data plan, but would still like to track your usage.
The Data Sense can also restrict the background data usage for all apps, provided you're near the data limit that's been previously set. This will prevent some apps from functioning properly, though.
The new Nokia Lumia 625 features the nicely helpful Kid's corner. You can select the apps and the types of media content that goes in and password-protect it, so you can safely share your smartphone with your kids without worrying that they will mess up your settings or access inappropriate content. When activated, the Kids corner is accessible by swiping left of the lockscreen. If you've secured it, your kids won't be able to return to your standard lock and home screen without the password.
Microsoft is trying to appeal to business users too - a company can create its own Hub where employees can find news, calendars and other info relevant to their work. Companies can also create their own apps that only employees can install.
The Nokia Lumia 625 uses the Qualcomm MSM8930 chipset (1.2GHz dual-core CPU, 512MB RAM and Adreno 305 GPU). That's as good as it gets for the mid-range WP8 devices at this stage, though it is enough to give you a hiccups free performance. A good thing is, the WP8 platform doesn't feel sluggish at all. Navigation is fast and animations are nicely smooth and fluid. Loading times aren't always perfect, but are never too long to be an annoyance.