dumbphone       
noun [ C ]  informal (also dumb phone) uk/ˈdʌm.fəʊn/ us/ˈdʌm.foʊn/
 没有上网功能的手机
a very basic mobile phone that cannot connect to the internet
  The phone was marketed as a very powerful smartphone at dumbphone prices.  这款手机被推销为价格是哑巴手机的功能强大的智能手机。 
 My old dumb phone had a much better battery life than this.
 Back in the dumbphone era, it was a real pain to switch to a new phone.
 Compare: smartphonefeature phone
 - More examples
 - I'm always streaming music, surfing the web, playing games, using GPS maps, etc. whereas on my dumbphone I couldn't do any of that.
 - If I can't use a smartphone without paying extra, I'll get a dumbphone.
 - I used to have a dumb phone and a separate music player.
 - Dumb phones are starting to be less and less common.