1. Run the Emport Diagnostics tool. Although the Emport status does not affect voice, it will allow you to refresh the SIM if possible.
   
   
2. Reboot or power cycle the device.
   
   
3. Check the local network coverage and mast status. Many networks provide an online coverage checker. They can be found by Googling “XXXXX network coverage checker”. Some commons are listed here.
   
   
4. Check if you can send or receive voice calls to or from other devices
   
   
5. If using the SIM internationally, ensure international roaming is enabled on the device. Please see your device manual or consult your device manufacturer on how to do this.
   
   
6. Other useful things to do are: try the SIM in alternative device, try an alternative SIM in the same device, try the device in a different location, manually roam the device onto the network, manually roam the device onto a different network (if possible), attach an antenna to the device
   
   

If you are still experiencing voice issues after completing some or all steps, please raise a ticket with Arkessa Customer Services.