"Does it mean that if this femto cell is installed in the place with existing macro coverage, unregistered handsets are actually worse off, because the femto will wipe out the weak signal from the macro cell and the handset will be left cold in the waters?"
This is a distinct possibility if the femtos are not located ideally, the link below outlines the potential femto 'dead zone' for example :-
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@Pav Lucistnik
"Does it mean that if this femto cell is installed in the place with existing macro coverage, unregistered handsets are actually worse off, because the femto will wipe out the weak signal from the macro cell and the handset will be left cold in the waters?"
This is a distinct possibility if the femtos are not located ideally, the link below outlines the potential femto 'dead zone' for example :-
http://www.mobilehandsetdesignline.com/howto/206902713