The update includes the android security update for the month of May, while the Android iteration hasn’t changed. Arriving in with build number G928TUVU4EQE1 the update weighs in at around 223MB in size.
Aside from the latest security patch the update also brings the fix to the intermittent call failure issue that many T-Mobile customers have been plagued by. As we mentioned above it’s an OTA update will take time to reach every unit. Those who are impatient can head over to the Setting’s menu on their device and manually check for the update.