Nowadays that agreements been removed in 99.999% of cases only remaining in a very very minority of areas. Perhaps it's gone all together now though... In actual fact quite a few remote areas were cut off entirely as 3 removed the Orange agreement but have no signal in that area still. My parents address included.
I assume 3 looked at the costs of the agreement, and might have decided that so few people were using it that they could save money - and invest in growing the 3G network.
In theory if EE now have 3G signal in an area, it should be in 90% of cases from an MBNL managed mast - which should, in theory, give both networks signal. However as we know there are still quite a few areas with Orange only masts left, and even if the local mast is right, it may not have the coverage needed without 2G.
plusnet unlimited fibre - 2 Jun 14 - 470m - 80/20 - Summer/dry sync 55/9.4, Winter/wet sync 52/9.1
15 years broadband (1999 ntl:cable trial) - Asus RT-AC68U with HG612 - BQM - Summer PN speed - Winter PN speed