UPDATE 6-Brazil court lifts suspension of Facebook's WhatsApp service
* Zuckerberg says he was stunned by Brazil WhatsApp ban
* Appeals judge branded lower court's suspension excessive
* Congressmen express outrage at suspension (Adds detail of WhatsApp market in Brazil, WhatsApp response )
By Jeb Blount and Marcelo Teixeira
RIO DE JANEIRO/SAO PAULO, Dec 17 (Reuters) - A Brazilian judge on Thursday ordered the lifting of a 48-hour suspension of the services in Brazil of Facebook Inc's WhatsApp phone-messaging application, overturning an order from a lower court.
The ban, which went into effect at midnight Wednesday, lasted about 12 hours until an appeals court judge overturned it.
The interruption of WhatsApp's text message and Internet telephone service caused outrage in Latin America's largest country, where the company estimates it has 100 million personal users, and led to angry exchanges on the floor of Congress.
WhatsApp is installed on 92.5 percent of Android devices in Brazil, making it the most installed app in the country, according to SimilarWeb, an internet intelligence and marketing company.
Rival messaging system Telegram said on Twitter that it received 1 million downloads in Brazil in one day due to the outage. Telegram was installed on 2.35 percent of android devices before the blackout and Facebook Messenger on 74 percent, SimilarWeb said. Continuación...