However, the latest Facebook service outage shows the issues that arise when attempting to consolidate a number of online services and apps together.
Facebook experienced a similar outage in 2008 when it had 150 million users.
"We are still investigating the overall impact of this issue, including the possibility of refunds for advertisers".
Downdetector.com, a crowd-sourcing site that tracks internet outages, showed a concentration of Facebook outages in the northeast as of Thursday morning.
Media reports earlier said millions of users were affected, and thousands took to Twitter on Wednesday and Thursday to complain under the hashtag #facebookdown.
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Meanwhile, it's also believed that a New York Times report contributed to the drop in Facebook's shares.
Facebook's shares fell almost 2 percent in morning trading on Thursday.
A NY grand jury has subpoenaed records from two smartphone makers involved in the partnerships, anonymous sources told the newspaper. "We are very sorry for the inconvenience and we appreciate everyone's patience".
"As we've said before, we are cooperating with investigators and take those probes seriously".
Facebook has maintained that it shared limited amounts of user data with smartphone makers and other outside partners to enable its services to work well on devices or with applications.
'We've provided public testimony, answered questions and pledged that we will continue to do so, ' the spokesman said. Facebook's desktop platforms and apps were affected in parts of the USA, including the East and West Coast, as well as parts of Europe and elsewhere.