Try SIP.TG Telegram Softphone for personal use if you are already actively using Telegram and IP telephony tools.
There is no need to use third-party software, telecom operator applications, the need to switch between applications is reduced. Calls can be received from any of your devices, computer, tablet, cell phone, etc.
Appreciate the reliability and convenience of Telegram for receiving calls, battery saving, working even on unstable Internet connections anywhere in the world. Telegram voice algorithms are specially adapted for weak channels and mobile devices, unlike the classic SIP-telephony.
Use your Telegram account to receive and make calls from any number of SIP-accounts, share configured accounts with friends, family or colleagues.
Second line call, transfer and hold calls are supported.
See also:Telegram Softphone RatesInstructions on how to receive and make calls through @siptg robot