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Screen

The 6555 has external and internal displays. The external display shows the usual indicators and doubles as a viewfinder when using the camera. It shows colors nicely, but could be a little bit easier to see when used outdoors. Under cloudy skies, it is viewable, but the sun makes it much harder to see, with reflections and shadows obscuring the screen. The same goes for the internal screen. It is nice and bright, and colors are accurately represented when using the camera. It works well under clouds, but the sun taxes it a bit. Inside, though, it looks pretty darned good, with high resolution and sharp lines.

Signal

The 6555 was literally glued to AT&T's network. It always had four full bars of regular coverage. There was not a single instance when we looked at the phone and it had less than four bars. This includes the Lincoln Tunnel, the NJ vault, and dozens of locations in the Metro NYC area. Signal strength was always strong. The 6555 connected to AT&T's 3G network whenever it was available, and down-shifted to EDGE when it was not. It never dropped a data or voice call while we had it.

Sound

Phone calls made with the 6555 were crystal clear. There were never any echoes, hisses, crackles or pops. Voices sounded slightly "electronic" but we never had difficulty in hearing or understanding a conversation due to the phone. The ear piece speaker had sufficient volume for most everyday situations except for loud bars and rock concerts. Speakerphone calls were a little garbled from time to time and we blame that on the external speaker. For example, even at a setting of 4 out of 10, music played through the 6555 was loud enough to distort the sound. The only way to get a clean sound was to turn the volume down to 2. Anything above 4, and the sound quality degraded quickly. The experience during speakerphone calls was about the same.

Battery

Battery life for the 6555 was average. We were able to get through 3 days without charging if the phone is used moderately. That means some conversations, some web browsing, some text messages and some music. Listening to music over Bluetooth or spending lots of time in 3G areas, though, and the battery drains itself in two days. Pack a charger if you're going away for more than two days.

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