We tested the RIM BlackBerry Curve 3G 9300 in San Francisco using AT&T Wireless. We were impressed with the call quality, both incoming and outgoing. On our end, callers sounded great, with little to no distortion. There was hardly any static, and their voices sounded natural, too.
On the other end, callers said our voice sounded close to landline quality. They said we sounded great, with no hiss or any background noise. We also enjoyed great volume with the speakerphone, and they said there was surprisingly very little echo.
3G coverage was a little spotty in our area in downtown San Francisco. We were often kicked down to EDGE or GPRS speeds, which of course is much slower than 3G. With EDGE, we loaded the mobile CNET page in about a minute, while 3G speeds loaded the same page in just 14 seconds.
The audio quality over the speakers was average--fine for a speakerphone, but not as good for blasting music. We would opt for headphones for the latter.
While the Curve 3G's 624Mhz processor is not quite as fast as the 1GHz on more modern smartphones, it does the job well. Application launched with speed, and we had no problems multitasking. We also liked the phone's optical touch pad and overall navigation, though it does take a little getting used to at first.
The RIM BlackBerry Curve 3G 9300 has a 1,150 mAH lithium ion battery with a rated talk time of 5.5 hours and up to 14.5 days standby time. It has a tested talk time of 5 hours and 4 minutes. According to FCC radiation tests, the Curve 3G 9300 has a digital SAR of 1.07 watts per kilogram and has a M4/T4 hearing aid compatibility rating.