Update to the latest version

• Make sure you have the latest version of ACR Phone. You can check updates at ACR Phone's Google Play page

App cannot connect to SIP server?

• Ensure the server address, username, and password are correct. The server address should be a public IP or domain name.
• If that fails, try disabling the "Enable push notifications" option in the affected SIP account.

SIP calls not connecting?

• Try disabling the "Replace Via header" option under the advanced settings of the affected SIP account.

SIP call connects, but no audio at all?

• Disable all codecs except PCMUA under "Audio codecs" by going to ACR Phone > Settings > SIP Accounts > [3-dot menu] > Settings.
• If that fails, try changing the "Audio devices" setting to "OpenSL ES" by navigating to ACR Phone > Settings > SIP Accounts > [3-dot menu] > Settings.

SIP call connects, but no incoming audio?

• Try disabling the "Replace Via header" option under the advanced settings of the affected SIP account.
• If that fails, disable "Voice Activity Detection (VAD)" by going to ACR Phone > Settings > SIP Accounts > [3-dot menu] > Settings.
• Note: You may need to disable "Voice Activity Detection (VAD)" if "Enable push notifications" is activated and "Replace Via header" is disabled.

Poor SIP call audio quality?

• Reorder the codecs, placing higher-quality codecs at the top of the "Audio codecs" list. You can do this by going to ACR Phone > Settings > SIP Accounts > [3-dot menu] > Settings.

App draining battery too quickly?

• Enable the "Enable push notifications" option for each SIP account.

Incoming SIP calls do not wake the phone?

• Disable "Battery optimization" by going to ACR Phone > Settings > SIP Accounts > [3-dot menu] > Troubleshooting.
• If that fails, grant the "Exact Alarm" permission by going to ACR Phone > Settings > SIP Accounts > [3-dot menu] > Troubleshooting.