AT&T’s Samsung Galaxy S4 Mini i257 now joins the list of supported device for the VoLTE (Voice Over LTE) calling as a new software update to this device brings in all those what was needed to enjoy HD voice calls.AT&T Samsung Galaxy S4 Mini

This update for AT&T Galaxy S4 Mini i257 is available for download via Over the air and requires WiFi connectivity on your device. Depending upon your current Android version, this is sized from 102 MB to 595 MB. There is no change in the Android version as it still remains Android 4.4.2 Kitkat, so the Lollipop update is still pending and it could take time.

VOLTE Software Update Includes

  • VoLTE inter-op call hold
  • SIM less 911 Dialing update
  • ISIM SQN re-sync for VoLTE reregistration
  • v4v6 for IMS PDN while roaming

After update you will see the following under Settings > About Phone –

  • Software Version: 4.4.2 (KitKat)
  • Baseband Version:  I257UCU2BNK1
  • Kernel Version: 3.4.0-1928217
  • Build#: KOT49H.I257UCU2BNK1

Via : AT&T