Messagenet is part of the VoIP Recommended providers list included into Zoiper products: you may download the preconfigured Zoiper here:
https://www.zoiper.com/en/page/825bbd8f88f728f02255402b6aa46844
Notice: in order to avoid problem related to Registration Leases, after Zoiper provisioning (above) ensure to:
- disable Zoiper Push Services from Zoiper application menu
- reduce the Registration Interval to 300