Having same issues in the work, and at home and can confirm that N will kill it.
I have spend 100-200 hours with this device and have never been able to do the things why i bought it for, and at last it's breathing stopped with the wlan problems. Thank god i guess.
I have bought nokia mobile products since 1995 but lag of support makes me support other manufacturers from now on (15+ phones, including couple communicators, i-tablets and stuff).