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Screen

The QVGA display of the Z750a is simply gorgeous. It is crystal clear and super sharp. There are practically no bumpy pixel edges looking unkempt. Graphics and animations look smooth and clean. We had no trouble viewing it outdoors in partly sunny skies. Full-on sunlight didn't cloud things up more than most other phones. Colors look great, and viewing Web pages or other content is very enjoyable because the screen looks so good.

Signal

The Z750a did a masterful job of grabbing and holding onto AT&T's local signal. Both EDGE connections and HSDPA connections were solid. The five-bar signal indicator rarely dropped below three bars, no matter where we were. When in 3G coverage areas, the Z750a held the 3G signal both in doors and out, and didn't fluctuate back and forth between 3G and EDGE. It remained attached to the 3G network until we passed into an EDGE-only area.

Sound

Calls made with the Z750a sounded fantastic. Some of the clearest, cleanest calls we've made with a mobile phone in some time. Voices sounded like they were just in the next room, not miles away on a cell phone. There was no hissing, no popping or other noise. Just good, clean phone calls. As for music, and ringtones, Sony Ericsson did well with that tiny little speaker on the back of the phone. The sound quality is excellent. Our one complaint is that while you can really ramp up the volume for music, the ringers can't get quite as loud as we'd like. We did miss a call while in the car once (which is just as well, since talking on the phone is illegal in NJ).

Battery

The Z750a's battery did a decent job of keeping a charge for five full days with minimal use. That means a few minutes worth of calls each day, sending some text messages, and doing a little bit of web browsing. If you tap into the entertainment features, you're looking at about a day less of battery life. If you live in an area blanketed by 3G, expect only three days of battery life. The 3G radio cannot be turned off.

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