Is there any ‘history’ with your fathers landline telephone number , like it was with a different provider originally then ported at some point into BT , or was it originally a BT number , thenwas ported out to one or more providers before returning to BT , or has it always been a BT number with no other provider other responsible for it at any point in time ?
You say because calls from various mobile networks can’t get through it must be a BT issue , that may be true but it’s not necessarily so , what mobile networks in particular are the problems from as an example , Vodafone and ‘3’ are the same , and many MVNO’s like Voxi , Asda oblige , Smarty , Id mobile use VF/3 so effectively all the same network , and are any landline providers having the same issue like Virgin , Sky , Talk Talk etc ?
