So you want a phone line service only ? , a couple of things to note , as you have broadband from another provider (Starlink) you won’t qualify for the BT ‘no broadband’ discount, and therefore the costs for a telephone only service will be little or no cheaper than a combination of broadband (even if it’s slow ) with an included phone service …the price for standalone telephone is here .
https://www.bt.com/landline/deals/
A second issue is there is no PSTN telephone service available to order , so BT telephony has to be provided as Digital Voice ‘DV’ , an IP (internet protocol) service, and even if you are unaware , in the background or possibly foreground you will have broadband to make the telephone service work …there are two ways , one is you are provided with broadband that you don’t pay for , your phone is connected to the broadband router that you are supplied with , to connect your phone instrument to (because it’s DV ) or you are connected to ‘broadband’ but the broadband equipment and analogue telephone adapter is located within the exchange so you don’t need any mains powered equipment inside your home for the telephone service to work but ‘under the hood’ it’s the same as everyone else’s DV service .
As standalone telephony is a pretty rare thing to order these days,(as opposed to legacy phone only customers that are still connected to the old PSTN phone network) as a new customer it may be problematic to arrange this uncommon product, and financially as you have broadband from another source it makes little or no sense to order it .
