fantastic voip provider ( im an ex BT customer who moved to ZEN for FTTP only , losing the copper phoneline) ,and ported my old landline number to yay.com and went for their voip service. absolutely world class support, and had an issue configuring my yealink w60 basestation and phone, litterally within 2 mins of ringing the helpdesk they provided remote desktop support to log in and configure the new basestation and handsets remotely. Have also now repurposed 2 old android phones with the yay app as well, so not short of phones here. Yay are highly reecomended by me for bringing your home phone service into the 21st century, far cheaper call packages than BT, and no line rental either