I have just spent a frustrating half hour on the phone to Virgin customer services trying to explain that my Gigaset call-barring phone is unable to block numbers, even though it is recommended on the Virgin Media website as being able to do just that, providing you have caller display (see section at the bottom of THIS PAGE). To rub salt in the wounds, he even tried to charge me an extra £2.25 a month to block unwanted calls!
I have done a bit of research and believe this is something to do with line voltage, which can be increased on request. So, I am sure that this will be seen by someone from Virgin Media, so I AM REQUESTING JUST THIS! I am not going to phone customer services again just to go round in circles. I am requesting, here and now that the voltage on my line is increased so that THE PHONE YOU ACTUALLY RECOMMENDED WORKS AS IT SHOULD AND BLOCKS CALLS!
Yes, caller display works. I don't know what voltage my phone requires, but it works fine on my mother's BT line, but on my Virginmedia line it will not block calls as it should. I have a real problem with nuisance calls and TPS doesn't work. It is a Gigaset C620a.
I really need this function to work, now, as these constant nuisance calls are getting quite distressing.