Having real trouble with tethering wifi. I have new Samsung Galaxy Note 4 (Android 4.4) which I am trying to tether to a new Lenovo Yoga 3 Pro. Since I have tried lots of stuff without success, I've replicated my testing across two computers (the other a Lenovo X240) and also tried both with my work phone, which is an iPhone 6+, for comparison and to hopefully help someone smart come up with a diagnosis.

Having tried 2 x laptops (Yoga, X240 both running Windows 8.1 64-bit) with 2 x phones, in each case trying both wifi tether and USB tether, I can report the following:

X240, iPhone, wifi - OK
X240, iPhone, USB - OK

X240, Note 4, wifi - "Can't connect to this network"
X240, Note 4, USB - OK

YOGA, iPhone, wifi - "Can't connect to this network"
YOGA, iPhone, USB - (no response at all - no error, no message, no connection)

YOGA, Note 4, wifi - "Can't connect to this network"
YOGA, Note 4, USB - OK

As a sidebar, I also tried Bluetooth connection on the Yoga - literally nothing. I was able to pair the devices, the Android phone reported "you are sharing the internet over Bluetooth" (but I think that's only because it was paired and the share mode was turned on) - but not a peep, not a failure message or an error, and certainly no internet connection!

I suppose the 'good news', since my main goal here is to get online on the Yoga laptop using my Note 4 for internet access, is that it works with the USB connection - so worst case I have to carry a wire around with me. However it really irks me that this is necessary!!

Can anyone suggest what I need to do to get the wifi tether working? I saw a post earlier today about how to manually set up access by manually configuring an ad-hoc AP in Windows... don't know enough to know whether or not this is how a phone configures wifi to tether... it probably does... but we're getting (a) past my level of competence (b) beyond what should be needed to make something so "simple" work!!

Thanks in advance,