From Longman Dictionary of Contemporary EnglishFreefoneFree‧fone /ˈfriːfəʊn $ -foʊn/ noun [uncountable] trademark another spelling of Freephone
Examples from the Corpus
Freefone• For your free copy dial 100 and ask for Freefone Real Fires.From Longman Business DictionaryFreefoneFree‧fone /ˈfriːfəʊn-foʊn/ noun trademark British EnglishTELECOMMUNICATIONS another spelling of Freephone