Recently, the T-Mobile LG G4 started receiving an update that included fix for the e911 timer issue. Now, the ZTE Zmax Pro on T-Mobile has started receiving a new update that brings along the same fix.
Aside from this, the update also includes Android security fixes for the month of March. Arriving as build number TMO_Z981V1.0.0B13, the update weighs in at around 45MB.
Elsewhere, the Verizon variant of the Asus Zenpad Z8 has also started getting a new update, which arrives as version V3.4.23. Not much is known about the update - Verizon's website just says it "gives you the most up to date Android security patches on your device."