What are you doing to unlock it? Are you just updatingto the stock release from HTC in Dec? Or do we just need to request the unlock from Sprint Customer Service?
HTC One M9 update for Nougate (7.0, security patch February 1, 2017) is now available for Sprint.
Shortly after an escalated call to Sprint Executive Customer Care today (where the representative told me that she was in touch with Sprint engineers and that there was no information on HTC updatees) ... The Android 7 (Nougat) update was made available (with February 1, 2017 security patches).
Recent calls with Sprint and with HTC customer support continued to yield misinformatoin ... with representatives of both companies indicating that no such update would become available.