Check your internet connection
Use a stable Wi-Fi or mobile-data connection. Moving between networks during a call can affect it.
Check microphone access
Allow OnRing to use the microphone in iPhone settings. Check your selected audio output if you use Bluetooth or headphones.
Check the number
Use the full international number, including country code. Make sure the destination is supported and you have an applicable balance or allowance.
Tell us about a problem
If the issue repeats, share the destination country, approximate call time and a short description with support. Do not email passwords or SMS codes.