PRINCIPAL CLIENTS (Tables)

12 Months Ended

Dec. 31, 2012

Risks and Uncertainties [Abstract]

Schedule of Revenue by Major Customers

The following table represents revenue concentration of our principal clients:

	Year Ended December 31,
	2012		2011
	Revenue	Percentage	Revenue	Percentage
AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T, Inc. (1)	$63,904	32.3%	$127,096	57.9%
T-Mobile USA, Inc., a subsidiary of Deutsche Telekom (2)	$55,916	28.2%	$43,698	19.9%

(1) Revenue from this customer is generated through our Domestic and Asia Pacific segments.

(2) Revenue from this customer is generated through our Domestic, Asia Pacific and Latin America segments.