We live in a topographic bowl where we do not get any cellphone service (no bars on HTC One).  But, if I go up to our 3 bay implement shed (about 80 meters distance) I get two bars on the phone.  What I want to do then is install a high gain yagi or dish antenna on the shed to boost the signal considerably, but then I now need some method to get that signal down to the house.  I think there are two options:  a) setup some type of cellphone repeater so that a boosted signal is now visible to the cellphone at the house, or b) somehow transfer the cellphone signal to a wifi signal and use a DECT type portable phone at the house that can now use the cellular system.  I do have a buried CAT 6 cable from the shed to the house and there is power at the shed.  I also have a buried phone line cable from the shed to the house that is available.  In the house I have the cellphone but I also have a Gigaset C610A IP which currently has a VOIP service connected but no land line.  Maybe another alternative is to use the high gain cellular service to add Vodafone RBI broadband and use a Vodafone sure signal box to relay the signal down to the Gigaset box.  That way I can select either the existing VOIP line or the cellular line.

Suggestions?

Craig