As the C6625's display isn't a touchscreen the phone runs Windows Mobile 6.1 Standard rather than the Professional edition. One of the key differences here is that the Office suite of applications can only be used to edit documents, as there's no facility for creating new documents from scratch. However, there's nothing to stop you from saving a simple template on your phone and then editing this to use it as the starting point for any new documents you want to create.
In some ways, we find the Standard edition of WinMo a bit easier to use than the Pro one mainly because the menus are laid out in a more straightforward fashion. We also like the sliding panels interface that Microsoft has added to the Standard edition as it gives you quick access to many of the phone's key features directly from the home screen. That said, by default this phone uses Samsung's own take on the Sliding Panels concept, but its version is sadly rather sluggish to use so you're much better switching back to the standard Microsoft one in our opinion.
On the connectivity front, the C6625 is a bit of a mixed bag. It supports HSDPA but only at speeds of up to 3.6Mbps and unlike most of today's smartphones its tri-band rather than quad-band, so it'll work in fewer countries around the world than other handsets. Samsung has also decided to leave out Wi-Fi so you're completely reliant on the mobile network for downloads. However, Bluetooth V2.0 with EDR is present and there's also onboard GPS, plus an FM tuner.
As with most business-focused handsets, the camera on the C6625 comes across as a bit of an afterthought. It's only got a 2-megapixel resolution, which is pretty tardy in this day and age, and while it does have a micro-mirror for framing self-portraits (for vain business folk?), it lacks a flash and autofocus. Unsurprisingly, given the low resolution, the shots it takes look pretty ropey when they're transferred to a desktop PC and viewed on a standard monitor.
The phone runs on an Arm 926EJ-S Nomadik processor that ticks over at 393MHz and there's just under 100MB of space free for storing your files, but you can bump this up using microSD cards (the slot is hidden behind an easy to get at flap on the left hand edge). In general, the phone feels relatively quick in use and battery life isn't too bad either. From a full charge we got around two days of medium usage from it. However, it's annoying that the charging connector (which doubles as the headphone jack) is of a non-standard Samsung type - really it should be a standard micro-USB type used on most new smartphones.
We like the C6625's slim and light design, good battery life and attractive price tag, however the handset is somewhat marred by its poor camera and the lack of Wi-Fi, the latter of which may be a deal breaker for many. The biggest issue, however, is that while the C6625 comes across as a perfectly decent phone, it definitely lacks the flair and wow factor of similar devices like the Blackberry Curve 8900 and HTC Snap. If your budget is tight it's still worthy of consideration, but if you've got a bit more cash to spend then we'd recommend you consider the other two handsets first.