This BT Premium Phone is powered by truCall's award-winning technology, allowing you to block 100% of nuisance calls* for total control over which calls you take and which ones you don't. You can block up to 1000 numbers or block calls by type by storing 1000 numbers on your Premium contact list, plus 1000 contacts from each of your synced mobiles. When you do answer calls you can see who's calling before you answer and, if you want to make a call yourself, you can easily redial any of the last 30 calls you made - simple.  Sync your mobile to your Premium Phone to copy contacts across and even make and receive your mobile phone calls through your landline. Great if you have mobile deadspots, just put your mobile somewhere it has a signal and then use your landline to receive mobile calls in the next door room. What's more, if you don't want to be disturbed for a while you can use the Do Not Disturb mode to silence all incoming calls, allowing you to watch your favourite programme or ha