T-Mobile US, Inc. — Director's Dealing 2010

Sep 23, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: METROPCS COMMUNICATIONS INC (PCS)
CIK: 0001283699
Period of Report: 2010-09-21

Reporting Person: TA ASSOCIATES INC (Director, See General Remarks)
Reporting Person: TA ASSOCIATES STRATEGIC PARTNERS FUND A LP (See General Remarks)
Reporting Person: TA ASSOCIATES STRATEGIC PARTNERS FUND B LP (See General Remarks)
Reporting Person: TA ASSOCIATES SPF LP (See General Remarks)
Reporting Person: TA Investors II L.P. (See General Remarks)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-09-21	Common Stock	S	1280	$9.8464	Disposed	331727	Indirect
2010-09-21	Common Stock	S	230	$9.8464	Disposed	59542	Indirect
2010-09-21	Common Stock	S	1250	$9.8464	Disposed	324068	Indirect
2010-09-22	Common Stock	S	1280	$9.9695	Disposed	330447	Indirect
2010-09-22	Common Stock	S	230	$9.9695	Disposed	59312	Indirect
2010-09-22	Common Stock	S	1250	$9.9695	Disposed	322818	Indirect
2010-09-23	Common Stock	S	1280	$9.9728	Disposed	329167	Indirect
2010-09-23	Common Stock	S	230	$9.9728	Disposed	59082	Indirect
2010-09-23	Common Stock	S	1250	$9.9728	Disposed	321568	Indirect

Footnotes

F1: These securities were sold solely by TA Strategic Partners Fund A L.P.

F2: These securities were sold solely by TA Strategic Partners Fund B L.P.

F3: These securities were sold solely by TA Investors II L.P.

F4: These securities are owned solely by TA Strategic Partners Fund A L.P. TA Associates, Inc. is the General Partner of TA Associates SPF L.P., which is the General Partner of TA Strategic Partners Fund A L.P. Each of TA Associates, Inc. and TA Associates SPF L.P. may be deemed to have a beneficial interest in shares held by TA Strategic Partners Fund A L.P. and each disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest in such shares which is subject to indeterminable future events.

F5: These securities are owned solely by TA Strategic Partners Fund B L.P. TA Associates, Inc. is the General Partner of TA Associates SPF L.P., which is the General Partner of TA Strategic Partners Fund B L.P. Each of TA Associates, Inc. and TA Associates SPF L.P. may be deemed to have a beneficial interest in shares held by TA Strategic Partners Fund B L.P. and each disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest in such shares which is subject to indeterminable future events.

F6: These securities are owned solely by TA Investors II L.P., TA Associates, Inc. is the General Partner of TA Investors II L.P. TA Associates, Inc. may be deemed to have a beneficial interest in shares held by TA Investors II L.P. and disclaims beneficial ownership of such shares.

F7: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by TA Associates, Inc. on March 3, 2010 and amended on March 12, 2010.