Hi All, We develop softphone for Windows Mobile on Pjsip and have a problem. Some devices work quite well - no problems at all. But at some devices - for example Acer n300 (WM 6.1 Classic) and HTC 3450 (WM 6.1 Pro), the sound is completely bad - CPU usage goes to 75-99%. Seems that the configurations of "good" and "bad" devices are the same and CPU performance is very close (from 350 to 520 MHz). But at the "good" devices CPU goes to 2-20% maximum. Any ideas would be appreciated. Best regards, Andrey Brokanov ProfInfoTech