estos provides the ProCall Enterprise mobile apps only as long as the ProCall version is still in its life cycle.
After the end of life of a ProCall Enterprise version, the mobile apps can no longer be used.
ProCall 6 Enterprise
The grace period for app usage in conjunction with ProCall 6 Enterprise (End of Life 2022) has been extended to . Please switch to a product version that is not yet End of Life as soon as possible. For more information on current ProCall Enterprise versions, see Product lifecycle.