VoLTE Testing for Device Manufacturers (OEMs)

Two types of VoLTE tests are available to the device manufacturing community, with two different routes to achieving the outcome you need.

  1. Manufacturers can contract directly through the GSMA, which will oversee the chosen device test type and publish the result.
  2. Self-accreditation. This route is particularly helpful for larger manufacturers who have invested in state-of-the-art VoLTE testing facilities. Self-accreditation requires you to share all trace information directly with the GSMA to corroborate your findings.

Common IMS Implementation

With either option, the GSMA recognises that manufacturers often have a common IMS stack and/or chipset across several devices (a “family” of devices). In this scenario, the GSMA allows one such device to be tested (the “parent” device) and other devices (“child” devices) to be declared as having a common IMS implementation to the tested device, and therefore do not have to be separately tested.

Device tests include:


Device Test
  • Testing of a device against test equipment (i.e. a simulated network) of an IMS-based service
  • The device is tested against all six recommended IR.25 IMS profiles or a nominated subset (e.g. Profile #6) to generically test its IMS service capability




Network & Device Test
  • Testing a real device against a simulation of an already-tested network
  • The test network is an emulation of the real network based on message traces obtained during the Network-only Test
  • The device is tested using the IMS configuration settings of the MNO network

We issue a certificate to device manufacturers who successfully complete the VoLTE tests, and the results are published on the GSMA website. Then this confirms their interoperability within the scope of our testing – in accordance with GSMA PRD IR.25. With self-accreditation, the GSMA will indicate the fact via the suffix ‘S’ (for ‘self’) in the certificate number.

GSMA Network Settings Exchange

GSMA Network Settings Exchange can further enhance your interoperability. What’s more, it helps your devices run as smoothly as possible. This is how it works. Its database provides access to the latest operator settings in a common format. From just one location. Sign up and join the world’s OEMs. Or check here to see if your company is listed.

Register your interest