If it is a genre, hold music, it's fair to say, is a troubled one with few hits. It's not really meant to be loved or even listened to — it's meant to communicate something specific: Don't hang up. (Cornell makes this plea specifically at the end of his song.) Silence is believed to be a death knell for phone calls — people will simply think the line is dead and hang up. This is true even on non-hold calls; it's why phone companies transmit something called a "comfort tone" over phone lines, a barely audible synthetic noise that signals a connection is still there.
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source: I tried putting music on my huawei g7010 and it wont play on my phone in music file. i go to my file manager, then to music file and the songs are the? peterartboy Level 1 (Contributor)
The term “ring” has long been an anachronism, as there haven’t been actual bells on phones for decades. The first ringback tones were created in Finland in 1998, when the Finnish mobile operator Radiolinja began offering the service of hearing customized monophonic ringtones and ringback tones that were sent over the air. Ringback tones, for whatever reason, never really caught on in America the way they did internationally.