Используйте приложение APKPure
Историческую версию Tbaytel можно получить на Android
Complements the rich VoIP business service set available from Tbaytel
Tbaytel Soft-Phone Agent. Available with Business Feature Set, Network-based Provisioning, Fully Integrated Tbaytel Communications Application Server for SIP dialing, multiple call handling, fixed mobile convergence, access to voicemail/message waiting indication (MWI), transfer, hold/resume, mute/unmute, conferencing, instant messaging, presence, click to call, click to email, click to chat, address books, call history and call recording.