I would like to suggest an app named iPlum - US Phone Number Call SMS, that I found on the Google Play Store. For calling, iPlum does not consume our voice plan minutes. It uses a separate secure data channel for calling and messaging on our mobile device, whether a phone or a tablet. With an Android smartphone or a tablet, iPlum works like a smartphone for inbound and outbound calling with any mobile or landline number. We can also get a full function voicemail in the iPlum app where callers can leave them the messages when they are not available to talk live.