We tested the dual-band (CDMA 800/1900;UMTS 2100), internationally quad-band (GSM 850/900/1800/1900) BlackBerry Torch 9850 in San Francisco roaming on U.S. Cellular. Even though we were on a roaming network, call quality was very impressive. Callers' voices had great volume and sounded clear and natural. There was hardly any static or distortion.
Callers didn't report any problems on their end either. They said our voice sounded loud and clear, and as natural as on a landline call. They did detect the occasional background noise, but it wasn't distracting. Speakerphone calls were similarly good, though callers did report a more pronounced echo effect at times.
RIM BlackBerry Torch 9850 (U.S. Cellular) call quality sample
The Torch 9850's battery has a rated talk time of up to 6.8 hours and a rated standby time of up to 13.4 days. According to FCC radiation tests, the Torch 9850 has a digital SAR of 0.9 watts per kilogram.