A judge ordered that access to the popular messaging application be blocked in Brazil for two days from Thursday for its failure to comply with a court order.
Brazilian media reported that the judge wanted WhatsApp to provide investigators with access to the WhatsApp conversation of a suspect in a criminal case.
Brazilians have been expressing their surprise at the suspension and have been joking about how they would spend the next two days without access to the popular messaging service.
A user calling himself simply idiota (idiot) (@euidiotices) made it clear he felt adrift without WhatsApp when he posted the above picture and the sentence: "Me without whatsapp".
He was not the only one to make the connection to the popular film Cast Away.
Karina Ribeiro (@karinaribeiro72) said she would exchange some ideas with Wilson, the volleyball Tom Hanks' character starts speaking to while stranded on the deserted island.
Many others shared what they would do with their newfound time under the hashtag #Nessas48HorasEuVou (#Inthese48hoursIwill), which quickly began to trend.
While many of the users said they would pass the time by watching box sets of popular TV shows such as The Walking Dead and Supergirl, some seemed to have forgotten what a TV was.
Luis Mariz (@LuisMariz) tweeted: "#Inthese48hoursIwill we have a picture at home here that has people talking inside, I'm told it's called TV, does your home have one?"
Others wanted to use the outage to socialise with friends face to face...or even get to know their relatives better, such as user Luanete LS.
Some WhatsApp users clearly feel they have lost touch with their closest ones to a sometimes worrying degree, such as Brenda who said she would use the time to "find out who those strange people in my house are.
Some promised to use the time to read books they have so far struggled to finish or to simply watch the sun rise over Rio de Janeiro.
Many also want to return to the days before mobile communication and spend the next two days visiting people and "hugging them".
A thought shared by Rafaa (@rafa_dalri)...or not when she tweeted: "#Inthese48hoursI will have a social life. Just kidding, there's still Twitter".

The report indicates nearly a quarter of men and a sixth of women over the age of 55 who think they hear well actually have a hearing loss.
And less than a third of all adults with a hearing loss use a hearing aid.
The charity Action on Hearing Loss said it took most people a decade to seek help.
It is the first time the annual health survey, conducted by NatCen Social Research, has compared people's perceptions about their hearing with the results of actual tests.
Dr Jennifer Mindell, from UCL and one of the authors of the section on hearing, said the findings were worrying.
She told the BBC: "Whether people are in denial or just unaware of what they can't hear we don't know."
She said about half of the people who had said they had "great difficulty" hearing still did not use a hearing aid.
Dr Mindell said: "People think it's a normal part of ageing, and some don't want a hearing aid as they feel there's a stigma attached in a way that people don't with glasses."
Untreated hearing loss can lead to social exclusion due to the restrictive effect on conversation.
Dr Mindell said it was a "cause for concern" and there was a link between untreated hearing loss and poor mental health.
The report suggests:
Gemma Twitchen, an audiologist with the charity Action on Hearing Loss, said: "Reluctance to acknowledge hearing difficulties is far more common than we might think - on average it takes people 10 years to seek help for hearing loss.
"Early diagnosis is key, and hearing aids are vital in ensuring people can continue to communicate better with friends and family.
"We would urge anyone that is concerned about their hearing to take our free hearing check."
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Brazilians angered at the 48-hour suspension by a court of the WhatsApp messaging application have been taking to social media.
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Around two million people who need a hearing aid do not even realise they have problems, the annual health survey for England suggests.