One if these steps may help fix your issue, if unsuccessful it could be replaced under the warranty by Apple or Verizo-
Carrier settings update:
Restart your device
Press and hold the sleep/wake button and drag the slider once it appears on the screen. When your phone is off, press and hold the sleep/wake button and turn your iPhone SE back on.
Reset network settings
Reinsert your SIM card
Turn your device off, remove the SIM card, and put it back in. If the SIM card is damaged, ask Verizon for a replacement SIM card.
Reset all settings