Cell phones often don’t work when they get wet. A telephone riddle is:
 
Q: When doesn’t a telephone work underwater?
A: When it’s wringing wet.
 
The “ringing”/“wringing” pun has been cited in print since at least 2007.
 
             
Funny Jokes Live
Category: Telephone jokes
Date Added: 11/10/2007
Joke: When doesnt a telephone work underwater? When its wringing wet!
 
Twitter
Bollywood Sargam
@bollywoodsargam
Telephone jokes - 9033 Joke: When doesn’t a telephone work underwater? When it’s wringing wet! .... http://bit.ly/13LVgF
5:22 PM - 4 Aug 2009
 
26 September 2010, The Sunday Mail (Adelaide, Australia), “Holiday Fun Guide Giggles,” pg. 3:
Q When doesn’t a telephone work underwater?
A When it’s wringing wet!
   
Google Books
The Mammoth Book of Really Silly Jokes:
Humour for the whole family
By Geoff Tibballs
London, UK: Constable & Robinson Ltd
2011
Pg. ?:
When doesn’t a telephone work underwater?
When it’s wringing wet.
     
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?:
When doesn’t a telephone work underwater? When it’s wringing wet!
 
Twitter
Lucky Score
@LuckyScoreNet
When doesn’t a telephone work
underwater?
When it’s wringing wet!
#Joke from #TelephoneJokes in #Jokes, #Humor and #Satire
11:59 PM - 26 Apr 2018