when is tmobile releasing samsung galaxy s6 software update

Moto Z 2 Play non-Verizon ( certified with T-Mobile Verizon model confirmed not to support T-Mobile VoLTE, see the link below).Nokia 6 (VoLTE works although an early user reported inability to place a VoLTE call to other T-Mobile phones).Moto E 4 Plus Unlocked (VoLTE and Wi-Fi calling confirmed).Moto E 4 Unlocked XT1768 (Wi-Fi calling and VoLTE confirmed, Verizon model confirmed not to support T-Mobile VoLTE).Alcatel Idol 5S (T-Mobile VoLTE listed in the specs).Alcatel A50 (T-Mobile VoLTE listed in the specs).OnePlus 5 ( VoLTE and Wi-Fi calling confirmed).

HTC U11 (T-Mobile VoLTE and Wi-Fi calling in the official specs).Samsung Galaxy S8+ SM-G955U1 ( VoLTE and Wi-Fi calling confirmed).

Samsung Galaxy S8 SM-G950U ( VoLTE and Wi-Fi calling confirmed).

OnePlus Two North American model ( VoLTE confirmed working).

BLU R1 HD (VoLTE confirmed working after May 2017 update) - Sales of all BLU phones suspended due to privacy and security concerns.

ZTE Blade V8 Pro Z978 (VoLTE confirmation).

Moto G 5 Plus (VoLTE supported as it was certified with T-Mobile Wi-Fi calling confirmed ).

HTC U Ultra (VoLTE confirmed, Wi-Fi calling assumed to work with T-Mobile).

Huawei Mate 9 MHA-L29 ( VoLTE verified).

Huawei Honor 6x (VoLTE support confirmed).

ZTE Axon 7 Mini B2017G ( VoLTE officially announced in January 2017 software update release notes, Wi-Fi calling is supported as of June).

LeEco Le Pro3 LEX727 ( VoLTE support verified Wi-Fi calling confirmation).

Alcatel PIXI 4 (5 inches) (VoLTE confirmed).

Moto Z Play Unlocked XT1635-02 (VoLTE confirmed.

Blackberry DTEK60 (VoLTE confirmed by ZDNet reviewer).

Google Pixel and Pixel XL (VoLTE confirmed by T-Mobile Products guy).

Moto Z (VoLTE supported as it was certified with T-Mobile ).

Moto G4 Play XT1607 (VoLTE supported as it was certified with T-Mobile ).

ZTE Axon 7 A2017U ( VoLTE confirmed, Wi-Fi calling support available with March 2017 update).

Moto G 4 Plus XT1644 (VoLTE supported as it was certified with T-Mobile).

Moto G 4 XT1625 ( VoLTE confirmed, see also certification).

Samsung Galaxy S7 Edge SM-G935U ( VoLTE confirmed).

Samsung Galaxy S7 SM-G930U ( VoLTE confirmed).

OnePlus 3 North American model ( VoLTE support verified, Wi-Fi calling confirmed).

HTC One M10 Unlocked ( VoLTE supported).

Nextbit Robin GSM model ( VoLTE supported) - Customer support ended software will be updated till Feb 2018.

When is tmobile releasing samsung galaxy s6 software update