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

Oct 1, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: METROPCS COMMUNICATIONS INC (PCS)
CIK: 0001283699
Period of Report: 2010-09-29

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
2010-09-29	Common Stock	S	1280	$10.4558	Disposed	324047	Indirect
2010-09-29	Common Stock	S	230	$10.4558	Disposed	58162	Indirect
2010-09-29	Common Stock	S	1250	$10.4558	Disposed	316568	Indirect
2010-09-30	Common Stock	S	1280	$10.4251	Disposed	322767	Indirect
2010-09-30	Common Stock	S	230	$10.4251	Disposed	57932	Indirect
2010-09-30	Common Stock	S	1250	$10.4251	Disposed	315318	Indirect
2010-10-01	Common Stock	S	1280	$10.6551	Disposed	321487	Indirect
2010-10-01	Common Stock	S	230	$10.6551	Disposed	57702	Indirect
2010-10-01	Common Stock	S	1250	$10.6551	Disposed	314068	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.