Question [Q] Quick question regarding OTA update

Hello all

Like most AT&T users I recently received the notification for an update to Android 4.3. I'm currently on 4.2.2 MF3. I rooted using the guide here.

My question is this: is it safe to do the OTA update without any preparation? Will all of my settings/apps remain intact? Will I run into any issues as a result of being rooted? I assume the root will not remain after the update, so it is possible to root on the 4.3 OTA update?

Thanks in advance guys