The Bluetooth SIG is preparing for lossless and spatial audio formats. Standardization reduces proprietary requirements and licensing fees. These formats are unlikely to appear until the next decade.
Windows is notorious for having Bluetooth connection issues, but you can do something about them.
This basic GSM phone is similar to the 2660, but adds a VGA camera and upgraded TFT display. Others features are similar, including a clean clamshell design with internal antenna and external display, ...