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Samsung has been pretty clever with the Galaxy Beam's build, whose design is by no means dominated by the projector component. A bright yellow band running all around the edge has the dual function of making the phone look a little different from the norm and attracting the eye away from the bulge that the projector lens makes in the top edge.
The handset isn't a lot bigger or more unwieldy than other smartphones. At its thickest point, at the top where the projector sits, it measures about 15mm. Samsung doesn't include this in its specifications, preferring to quote the 12.5mm thickness of the two long and the lower short edges. This is slightly bulkier than you'd expect from a top-end handset, but it's unlikely to be a deal-breaker.
The projector does affect the phone's weight, which is an above-average 148g — although, again, this is by no means excessive. The projector displaces the headset jack from its usual ergonomic location on the top edge to a potentially pocket-snagging spot on the left edge. Also, the SIM and microSD slots are covered bays on the left and right sides respectively, rather than residing under the battery cover.