PRINCIPAL CLIENTS

6 Months Ended

Jun. 30, 2016

The following table represents revenue concentration of our principal clients:



	Three Months Ended June 30,								Six Months Ended June 30,
	2016				2015				2016				2015
	Revenue		Percentage		Revenue		Percentage		Revenue		Percentage		Revenue		Percentage
T-Mobile USA, Inc.	$	17,045	23.1	%	$	17,033	26.8	%	$	33,062	21.8	%	$	35,123	27.6	%
Sprint / United Management Co.	$	11,257	15.3	%	$	3,162	5.0	%	$	22,129	14.6	%	$	3,162	2.5	%
AT&T Services, Inc. and AT&T Mobility, LLC	$	9,734	13.2	%	$	8,070	12.7	%	$	20,221	13.3	%	$	18,810	14.8	%
Comcast Cable Communications Management, LLC	$	7,025	9.5	%	$	7,930	12.5	%	$	14,241	9.4	%	$	16,809	13.2	%

We enter into contracts and perform services with our major clients that fall under the scope of master service agreements (MSAs) with statements of work (SOWs) specific to each line of business. These MSAs and SOWs may automatically renew or be extended by mutual agreement and are generally terminable by the customer or us with prior written notice.

Effective July 1, 2011, we entered into a MSA with T-Mobile. It has an initial term of five years and will automatically renew for additional one-year periods thereafter. It may be terminated by T-Mobile upon 90 days written notice.

Effective July 1, 2011, ACCENT, a business we acquired in 2015, entered into a MSA with Sprint. It has an initial term of three years and automatically renews for additional one-month periods thereafter. It may be terminated by Sprint upon 30 days written notice.

On January 25, 2013, we entered into a MSA with AT&T Services, Inc., and we are currently negotiating a new MSA with them. There are a number of SOWs for several different lines of AT&T business. These SOWs expire prior to 2018.

Effective June 22, 2013, we entered into a MSA with Comcast. The agreement has an initial term of one year and will automatically renew for additional one-year periods unless either party gives 90 days written notice of cancellation. The contract was renewed for the year ending June 22, 2017.

To limit credit risk, management performs periodic credit analyses and maintains allowances for uncollectible accounts as deemed necessary. Under certain circumstances, management has required clients to pre-pay for services. As of June 30, 2016, management believes reserves are appropriate and does not believe that any significant credit risk exists.