Excerpt from a review:
The front panel features an external screen of 96x64 pixels showing 65K colours (STN). In the standby mode you will see time and status icons on it. The quality o the picture is middling on the screen and badly read in the sun. We can't consider this screen comfortable due to small physical size (20x14 mm), the quality of shown colours more corresponds with 4096 and is comparable with screens of the first generation. While shooting, you can use the external screen as a viewfinder.
The camera objective is placed in the bottom part of the front panel; its mirror edging is too thin to be considered a mirror, which is more a decorative element. A camera module differs from the ones used in the 75th series devices, which is quite logical.
The bottom end features an interface connector coinciding with the one for the 75th series, which confuses many people considering accessories. Even if a headset will work with this device, a USB cable (510th) won't - only DCA-500 will suite, but even it seems useless due to the phone restrictions.
Two buttons found room on the right side - that is a camera button and a speakerphone button below (Push to Talk is absent despite it was planned earlier). Volume buttons are placed on the opposite side, and they can help activating backlighting for the external screen.
An IrDA gap is placed on the right side. This wireless technology is the main mean for communicating with the world for the CL75. And the more problems when it goes wrong are. There are only several devices Siemens CL75 can connect to (for instance, Sony Ericsson K750 doesn't work with it at all). Very funny situations happen when exchanging data with Siemens products, and namely the 75th series. Truly, we managed to establish connection after several attempts and got the worst impression. High speed of the port, which Siemens' worshipers admire so much, means nothing due to its poor compatibility with the majority of represented products. This phone lacks the corporate Siemens' feature - a capability to upload Java applications via IrDA or a cable, you can only use wap for it. A file transmitted via IrDA is limited to 350 KB, which sometimes hinders from sending clips created to a PC.
The internal screen uses a mirror mat; all the makers producing women phones try to copy this peculiarity of Samsung T500. However, the absence of personal technologies only makes such attempts unsuccessful and the Cl75 proves it again. The distance between the screen and the mat is too big, which results in the duality of the picture at certain angles and lighting conditions.
A special button activates the mirror, which is a central point in the promotion of the device. Despite frequent flares, the screen is well read in the sun due to the mirror covering. This phone greatly differs from other 75th series representatives with a mirror layer in the screen. Behaviour in the sun is much worse; indoors it is also imperfect (worse than in Siemens CX75). The manufacturer claims 262K colours; however, it seems it shows not more than 65K. The resolution of the screen is 128x160 pixels (TFT, 28x35 mm), which allows up to 7 text lines and two service lines. The quality of the picture on the screen is not very good, and rouses negative impression in combination with rude interface drawing.
That's just the physical part. For a more detailed review (menu, features, etc) check out http://www.mobile-review.com/review/siemens-cl75-en.shtml.