If you're on T-Mobile using a Galaxy S5 and wondering where the update is that we previously told you about, you're going to have to wait a little bit longer. The update (G900TUVU1ANE5) was meant to be an improvement for intermittent failures for text messages and MMS messages but it appears to of have caused more issues than it resolved.
Folks who did manage to get the update downloaded via OTA or through Kies have reported a drastic slow down in download speeds along with reported decreased LTE coverage. At this point, the issue isn't affecting everyone but it's affecting enough people that T-Mobile saw fit to pause the update until it can be further addressed.
Hopefully it won't take too long to get it all sorted out and we'll see another update soon. Did you manage to get the update? If so, how's it working for you? Let us know in the comments how it all went for you.