VoLTE comes to the AT&T Samsung Galaxy S4 mini thanks to OTA update
VoLTE support has come to the AT&T branded Samsung Galaxy S4 mini. An OTA update has been pushed out today, and once it is installed, your Galaxy S4 mini will be able to make calls over AT&T's 4G LTE pipeline. The update will also allow you to make emergency calls to 9-1-1 without having a SIM card plugged into your phone.
AT&T is requiring you to have a Wi-Fi connection when downloading and installing the update. After all, depending on the version of Android currently employed on your phone, the file could range in size from 102MB to a whopping 595MB. And make sure that you have a sufficient charge on your phone. Considering the possible size of the update, you might want to have the battery charged to at least 50% before you proceed.
source: AT&T via AndroidCentral
As with most OTA updates, AT&T is sending this out in waves. That means you might not be one of the lucky ones who receives it today. In fact, it might be several days before it arrives. You can try to coax it our of your phone by going to Settings > More > About > Software updates.
source: AT&T via AndroidCentral
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