I've been searching for a while and these forums seem like the best source of info on Wansview cameras, so I humbly submit to you my issue:
I just bought a Wansview NCB-541W (which I believe is also known as the NC541). After getting it set up, I wasn't hearing any audio, so I decided to flash it with the firmware for the Foscam FI8908W, 126.96.36.199. I figured it'd be ok since the Wansview site actually links to the Foscam site for firmware, however, although with the new firmware I now have audio (at least one-way), I can no longer connect wirelessly to the camera.
I've tried various WebUI versions, and currently I'm using 0.0.4.17.
I'm not aware of any way to revert to the original firmware, since this file is not on the CD that came with the camera, or, as far as I can tell, anywhere on the web. I even called the number for Wansview technical support, which turned out to be Foscam tech support, to find out what firmware I should use, but, as you might imagine, I received no help.
The only other thing I'll mention is that, although this camera is advertised as being b/g compatible, it was connecting to the 2.4 GHz band of my N-only wireless network prior to me flashing the Foscam firmware.
Any ideas how I might get wireless connectivity back? Audio would be nice, too!