The minimum supported version of the viva.com | Terminal is the 4.8.0.
This means that your device* will be unable to accept payments unless you update the viva.com | Terminal to the latest version.
Steps to update viva.com | Terminal
1. Open Google Play / App Store
2. Search for "viva.com | Terminal"
3. Tap on the "Update" button
*Smartphones and tablets running viva.com | Terminal
Ciontek CS30PRO
Ciontek CS30PRO with professional scanner
Ciontek CS50Cy
Mini Card Reader connected to Android devices via Bluetooth or USB