XT network (preferably pre-paid as I spend most of me time at home from where I run a holiday accommodation so dont make a lot of mobile calls)
VoiP over WiFi (I have a WiFi covering the property)
and ideally something that can be used as a cordless phone so I dont have to carry round my 5.8Mz cordless as well as my mobile.
Does such a device exist? I realise the corless phone replacement is a big ask but thought I would see in anyone knew if there is a device that will do this or aniother way to do the same thing?