BT shops sell Smart watches that are linked to your celphones by Bluetooth and are capable of receiving texts and data from the internet. This is regarded by BT as using the BT Mobile data network as a bluetooth hotspot which BT say they do not support as it is classed as a form of tethering.
This then prompts the question is bluetooth hotspot between devixes allowed or not. If not why are BT selling smart watches which need this facility to operate properly?
Here's proof. There is no way this device can operate properly without a bluetooth connected celphone with a data connection.
I can understand BT saying they don't support it but this anomoly proves that BT must allow it or they are selling devices that is impossible to be used on thei BT mobile data network rendering them useless.
So come on BT give us a straight answer is tethering allowed or not. If not you should withdraw the watches from sale at BT Shops as being incompatible with the BT mobile network and not supported by BT's user policy in respect of their need to be tethered to a mobile phone network.
Of course the watches mirror some of the phones data but they also have their own independant apps like news feeds, internet access, weather, navigation directions and many other apps that use the data network via bluetooth but independantly from the phone. My watch has quite a few apps that works independantly from the phone but it still uses data via the phones bluetooth connection so t it uses my network data allowance by using the phone as a blutooth modem.
Obviously the cases you mentioned such as headphones, loudspeakers etc do not use data but this is not the case with smart watches. My watch also has Wifi access so when I am within range of my home router it switches to that for access so it can still use data independantly from the phone,therefore it is not just mirroring the phone but using my broadband access. Obviously this is not the case when not at home or in range of my router when it then uses the phone as it's source of network access.
this is not the only device that I have that works like this. I also have a satnav which uses a bluetooth connection to my mobile phone for live traffic updates whilst travelling. This is also using the data via the phone as a blutooth modem and not mirroring the phone.
If you interpret BT Mobiles rules regarding tethering, either wired or via blutooth, they are not supported.
What a farce as I currently use EE which is now owned by BT and they do allow tethering.
BT even advertise their mobile service which offers the facility to 'watch BT Sport Lite content, including 38 Barclays Premier League games, live Aviva Premiership Rugby & SPFL for FREE with the BT Sport app on your smartphone'. This is more likely to flood and congest the mobile network at certain times by streaming these live to a mobile phone but they do not care whether your data limits are exceeded then.
Tehering now available BT announce initially on android with Iphone (IOS) to follow soon
Thanks @pottyperson... though this thread is about SIM only plans. The text in the link states "BT is today launching new pay monthly mobile phone contracts with the latest phones from the big brands".
So it's not clear whether the change include SIM only.