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Receiving Calls with a Mobile Softphone while traveling internationally.

4 min. readlast update: 02.28.2025
The Crazytel CrazyPhone mobile softphone app transforms your smartphone into a powerful business phone system. This guide specifically focuses on how to properly configure and optimize your mobile softphone to receive incoming calls reliably, both within Australia and while traveling internationally.

International Call Reception

Important Note: With the CrazyPhone mobile softphone, you can receive calls overseas on your Australian VoIP numbers, including:
  • Local Australian numbers
  • Virtual Mobile Numbers
  • 1300/1800 numbers
This means you can stay connected to your Australian contacts while traveling internationally, requiring only an internet connection.
Please be aware: Crazytel physical SIM card mobile plans do not support international roaming. If you plan to travel overseas, using the CrazyPhone app with a VoIP number is the recommended solution for maintaining your Australian phone presence.

Country Restrictions

Important Warning: VoIP services are banned or restricted in some countries due to regulatory policies. The CrazyPhone app may not function in countries with VoIP restrictions, including:
  • China
  • United Arab Emirates (UAE)
  • Oman
  • Qatar
  • Kuwait
  • Saudi Arabia
  • North Korea
  • Some Caribbean nations
Before traveling, research the VoIP regulations at your destination to avoid connectivity issues. In some cases, VPN services might provide a workaround, but be aware that using VPNs may also violate local regulations in certain countries.

Prerequisites

Before you can receive calls on your mobile softphone, ensure you have:
  1. An active Crazytel account with either:
  • A SIP Trunk subscription, or
  • A CrazyPBX Extension
  1. The CrazyPhone app installed on your mobile device
  1. Properly configured the app using a QR code (not manual credentials)
  1. A stable internet connection (Wi-Fi or mobile data)
  1. A phone number (DID) assigned to your SIP Trunk or Extension

Setting Up Call Reception

Step 1: Ensure Proper Configuration

First, make sure your softphone is properly configured:
  1. Open the CrazyPhone app
  1. Check that your status shows as "Registered" or "Available"
  1. Verify that the correct SIP Trunk or Extension name is displayed
  1. Ensure the app is allowed to run in the background

Step 2: Configure Device Settings

Optimize your device settings to ensure you don't miss calls:
  1. iOS Devices:
  • Go to Settings > Notifications > CrazyPhone
  • Enable "Allow Notifications"
  • Set "Sounds" to On
  • Enable "Background App Refresh" for CrazyPhone
  1. Android Devices:
  • Go to Settings > Apps > CrazyPhone > Notifications
  • Ensure notifications are enabled
  • Set to "Priority" or "Urgent" if available
  • Disable battery optimization for the CrazyPhone app

Step 3: Test Your Configuration

  1. Place a test call to your Crazytel number from another phone
  1. Verify that the CrazyPhone app rings and displays the incoming call
  1. Test answering the call and check audio quality

Receiving Calls While Overseas

When traveling internationally:
  1. Internet Connection: Connect to a reliable Wi-Fi network or purchase a local data SIM
  1. App Configuration: No additional configuration is needed beyond the standard setup
  1. Time Zone Awareness: Be mindful of the time difference between your location and Australia
  1. Data Usage: Monitor your data usage as VoIP calls consume bandwidth
  1. Call Quality: Call quality may vary based on your internet connection speed and stability

Common Call Reception Issues and Solutions

App Not Ringing

If the CrazyPhone app doesn't ring when you receive a call:
  1. Check that your device is not on silent or Do Not Disturb mode
  1. Verify that the app has notification permissions
  1. Ensure the app is running (at least in the background)
  1. Check for stable internet connectivity
  1. Restart the app and/or your device

Call Goes to Voicemail Too Quickly

If calls go to voicemail before you can answer:
  1. Increase the ring timeout in your Crazytel portal settings
  1. Ensure your device isn't in battery saving mode which might restrict the app
  1. Check that you don't have call forwarding set up incorrectly

Poor Call Quality

If you experience poor audio quality:
  1. Switch to a more stable network connection
  1. Close other apps that might be using bandwidth
  1. Try moving to an area with better signal strength
  1. Restart your device and/or your internet connection

Best Practices for Reliable Call Reception

  1. Keep the App Updated: Always install the latest version of the CrazyPhone app
  1. Use Wi-Fi When Possible: Wi-Fi generally provides more stable connectivity than mobile data
  1. Background Running: Ensure the app is allowed to run in the background
  1. Regular Testing: Periodically make test calls to ensure everything is working properly
  1. Battery Management: Be aware that battery saving modes can affect the app's ability to receive calls

International Travel Preparation

If you plan to travel overseas and want to ensure reliable call reception:
  1. Test Before Departure: Configure and test your softphone before leaving Australia
  1. Download Updates: Update the app before traveling to avoid large downloads on international data
  1. Research VoIP Restrictions: Check if your destination restricts VoIP services
  1. Set Up Voicemail: Configure voicemail-to-email as a backup for missed calls
  1. Inform Contacts: Let important contacts know you'll be overseas but reachable on your Australian number
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