About SMS service from AWS SNS

I want SNS to send SMS to cell phones. I checked the AWS document, it says

SMS notifications are currently supported for phone numbers in the     
United States. SMS messages can be sent only from topics created in the 
US East (N. Virginia) region. However, you can publish messages to 
topics that you create in the US East (N. Virginia) region from any 
other region.

But I don't know how to publish a message to the topics that I create in the US East region from US West which my aws nodes are located.

Googled a lot, but without luck. Does anybody here know how?