Problems with the Blackberry smartphone system appear have to spread to the United States.
Users began to report loss of services on Wednesday, with many turning to Twitter to complain about their lack of email.
The latest development follows two days of sporadic blackouts across Europe, the Middle East and Africa.
Blackberry’s owner, RIM, said that the earlier problem was caused by core and back-up switch failures.
As news of the failure in the US spread, one user tweeted: “What is the status here in the USA? I am in New York and there seems to be no email service.”
Another, who lives in Texas, wrote: “My #blackberry is not working! I can dial out that’s it. What’s up?”.
Read More/Source: BBC News