[T-Mobile Samsung Galaxy Note5] clsA:
don't downgrade. all i did was install Titanium backup pro and removed the t-mobile crap and flashed the skyhigh kernel

search for SM-N920T--kernel-SkyHigh_MM_v3.8_-[16-05-27]

you need custom recovery and root of course

just look at post 2 here for those http://xdaforums.com/tmobile-galaxy-note5/development/rom-n920tuvu1boh4-5-1-1-deodexed-ciq-t3194270

here's a list of the crap i removed

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.apps.walletnfcrel-34e78cc8adf2605903d8a9b378bc3fe8.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.apps.walletnfcrel-20160528-111852.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.apps.walletnfcrel-20160528-111852.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.inputmethod.latin-28560a5eca0114840e8329e3aa791b30.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.inputmethod.latin-20160528-022950.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.inputmethod.latin-20160528-022950.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.videos-20160528-023018.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.videos-20160528-023018.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.google.android.videos-d393475d23367658705dc52436ca992b.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.lookout-4dd49329b2fe218a49feabc079cf2839.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.lookout-20160528-023114.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.lookout-20160528-023114.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.excel-37d434c9664e16d022fd2a36360dbb44.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.excel-20160528-022904.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.excel-20160528-022904.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.onenote-6e20fc7070792877adbdfc0c6d74927a.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.onenote-20160528-023206.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.onenote-20160528-023206.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.powerpoint-444de86aa12d8ffff904d7781adfcf70.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.powerpoint-20160528-023243.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.microsoft.office.powerpoint-20160528-023243.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.mobitv.client.tmobiletvhd-82be0e1c9541ab862ec784476d88a4cb.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.mobitv.client.tmobiletvhd-20160528-023503.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.mobitv.client.tmobiletvhd-20160528-023503.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.samsung.android.spay-20160528-112115.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.samsung.android.spay-20160528-112115.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.samsung.android.spay-b7fe6d9c63aa4cc436a35e1f91a0232a.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.samsung.tmovvm-3d962662dd7c8fd6e19d4b89504be2b5.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.samsung.tmovvm-20160528-023617.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.samsung.tmovvm-20160528-023617.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.sec.android.app.myfiles-20160528-112042.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.sec.android.app.myfiles-20160528-112042.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.sec.android.app.myfiles-ad521e87763e4ddaa35f7e36b911c6b5.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.sec.android.app.samsungapps-229d7dd2b41f3866c3b60838d50901e7.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.sec.android.app.samsungapps-20160528-112321.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.sec.android.app.samsungapps-20160528-112321.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.pr.mytmobile-887e9e8f24d50fabece0ed8e72cdde89.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.pr.mytmobile-20160528-023429.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.pr.mytmobile-20160528-023429.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.simlock-628b152f25c6ddb825343b2b71e74ee8.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.simlock-20160528-022827.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.simlock-20160528-022827.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.vvm.application-1c05831280051a03e3b546ee8f40e7c4.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.vvm.application-20160528-023605.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.tmobile.vvm.application-20160528-023605.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.whitepages.nameid.tmobile-3b6efef0e2728f26e40876400623ef09.apk.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.whitepages.nameid.tmobile-20160528-023448.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\com.whitepages.nameid.tmobile-20160528-023448.tar.gz"

"D:\Note 5 Root\sdcard\backups\tb_backup\us.com.dt.iq.appsource.tmobile-20160528-111657.properties"

"D:\Note 5 Root\sdcard\backups\tb_backup\us.com.dt.iq.appsource.tmobile-20160528-111657.tar.gz"

I used this to change the boot animations >> Aroma_Bootani_1440x2560_v4_MM.zip