Phones and numbers

Device support, keeping your number, caller ID and emergency calls.

• Emergency calls over VoIP, Wi-Fi calling and apps: what works and what does not

  Can you call 112 or 911 over Wi-Fi calling, a VoIP line or a messaging app? How the rules differ in the EU and the US, how your location is sent, and how to stay safe.

• Keeping your number: porting, caller ID and spoofing when you call over the internet

  Your rights when moving a phone number to another provider in the EU and US, how VoIP services display your caller ID, and how networks fight spoofed numbers.

• Supported devices: what makes a phone work well (or badly) for internet calls

  Why calling apps and Wi-Fi calling work on one phone and not another: operating system support, background limits on iOS and Android, carrier settings, Bluetooth headsets and older devices.