got siemens, panny and tosh, all 2.4G. siemens is the best! clear sound, loud. panny is mid. not so loud. so sometimes hard to hear. tosh is worst due to very short batt life.
also had uniden and panny, both 900. uniden is handy for twin lines, short batt life [still longer than tosh] panny is quiet [same as 2.4G model], but hand free feature [also on 2.4G model] is handy!
and aiwa, 46/49. worst among those.
all US spec, so caller ID doesn't work here.
now mom worries radiation, so no more cordless phone........