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After upgrade my N90 firmware to 5.0607.7.3 (16-02-06), it solves a lot of problems such as bluetooth headset connectivity.
However, I found that there is a new issue after the upgrade. Everytime when I make 3G video call, the camera flash light is blinking in an inconsistant interval.
After the video call, two files will be created in in the MMC card root directory. The file will be re-created during next video call session even I have deleted it. The files is eating up the space of my MMC card.
1. pvrcomm_rx.bin (20MB for 30 Min video call) 2. pvrcomm_tx.bin (20MB for 30 Min video call)
The files seems like binary dump file generated for troubleshooting usage. I think Nokia development team forgot to disable this feature after making the firmware public available.