“September 2010 Senior Notes Indenture” means the Indenture, dated as of September 21, 2010, as supplemented by the Second Supplemental Indenture, dated November 17, 2010, among MetroPCS Wireless, Inc., the guarantors party thereto and Wells Fargo Bank, N.A., as trustee, as supplemented by the Fourth Supplemental Indenture, dated as of December 23, 2010, by MetroPCS Wireless, Inc., the guarantors party thereto and Wells Fargo Bank, N.A., as trustee, as further supplemented by the December 2012 Senior Notes Sixth Supplemental Indenture, as further supplemented by the Seventh Supplemental Indenture, dated as of May 1, 2013, among T-Mobile USA, Inc., the guarantors party thereto and Wells Fargo Bank, N.A., as trustee, as further supplemented by the Eighth Supplemental Indenture, dated as of July 15, 2013, among T-Mobile USA, Inc., the guarantors party thereto and Wells Fargo Bank, N.A., as trustee, as further supplemented by that certain Ninth Supplemental Indenture, dated as of August 11, 2014, among T-Mobile USA, Inc., the guarantors named therein and Wells Fargo Bank, N.A., as trustee, as further supplemented by that certain Tenth Supplemental Indenture, dated as of September 28, 2015, among T-Mobile USA, Inc., the guarantors named therein and Wells Fargo Bank, N.A., as trustee, and as further supplemented by that certain Eleventh Supplemental Indenture, dated as of August 30, 2016, among T-Mobile USA, Inc., the guarantors named therein and Wells Fargo Bank, N.A., as trustee.
“Series Issue Date” means April 30, 2018.
“Series Issue Date Existing Indebtedness” means the notes of any series issued under the base indenture and in existence on the applicable Series Issue Date for the notes (including the DT Notes) (and any “Exchange Notes” (as defined in the base indenture) relating thereto) and, in each case, the related Note Guarantees (other than the notes of such series issued on the Series Issue Date), including, for the avoidance of doubt, (i) the $1.75B Notes existing on the Closing Date, (ii) the DT Notes existing on the Closing Date, (iii) the 6.000% Senior Notes due 2023 issued pursuant to the Base Indenture, as supplemented by that certain Seventeenth Supplemental Indenture dated as of September 5, 2014, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (iv) the 6.500% Senior Notes due 2024 issued pursuant to the Base Indenture, as supplemented by that certain Fifteenth Supplemental Indenture dated as of November 21, 2013, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (v) the 6.375% Senior Notes due 2025 issued pursuant to the Base Indenture, as supplemented by that certain Eighteenth Supplemental Indenture dated as of September 5, 2014, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (vi) the 6.500% Senior Notes due 2026 issued pursuant to the Base Indenture, as supplemented by that certain Twentieth Supplemental Indenture dated as of November 5, 2015, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (vii) the 6.000% Senior Notes due 2024 issued pursuant to the Base Indenture, as supplemented by that certain Twenty-First Supplemental Indenture dated as of April 1, 2016, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (viii) the 4.000% Senior Notes due 2022 issued pursuant to the Base Indenture, as supplemented by that certain Twenty-Third Supplemental Indenture dated as of March 16, 2017, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (ix) the 5.125% Senior Notes due 2025 issued pursuant to the Base Indenture, as supplemented by that certain Twenty-Fourth Supplemental Indenture dated as of March 16, 2017, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (x) the 5.375% Senior Notes due 2027 issued pursuant to the Base Indenture, as supplemented by that certain Twenty-Fifth Supplemental Indenture dated as of March 16, 2017, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (xi) the 4.000% Senior Notes due 2022-1 issued pursuant to the Base Indenture, as supplemented by that certain Twenty-Sixth Supplemental Indenture dated as of April 27, 2017, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (xii) the 5.125%% Senior Notes due 2025-1 issued pursuant to the Base Indenture, as supplemented by that certain Twenty-Seventh Supplemental Indenture dated as of April 28, 2017, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (xiii) the 5.375% Senior Notes due 2027-1 issued pursuant to the Base Indenture, as supplemented by that certain Twenty-Eighth Supplemental Indenture dated as of April 28, 2017, among Issuer, the guarantors named therein and Deutsche Bank Trust Company Americas, as trustee, (xiv) the 5.300% Senior Notes due 2021 issued pursuant to the Base Indenture, as supplemented by that certain Twenty-Ninth
75