Freephone
noun [ U ] (trademark Freefone) uk/ˈfriː.fəʊn/ us/ˈfriː.foʊn/
接收方付费电话，免费电话
a system in the UK that allows you to phone particular organizations without paying for the call, because they will pay the cost
a 24-hour freephone customer ordering service 24小时顾客订购免费电话服务
For further details, call Freephone 0800 123456/call our Freephone number 0800 123456. 欲知详情，请拨打免费电话0800 123456。