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iPhone / iPad
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Download from AppStore

Free calls to US and Canadian numbers.
Free calls to more than 2000 VoIP networks.
For instructions please visit
Startup wizard.
Audio/video calls.
Online and offline messages.
Push notifications for longer battery life (please note, this works only with Sipmobile domain. To receive incoming calls with another sip servers turn on "run in background" in phone settings).
Secure communications with cryptographic software.
Supports modern codecs (Opus, WP8) for better audio/video quality.
Picture sharing.
iOS push notifications for longer battery life (works only inside Sipmobile domain).

Inside Sipmobile domain you can use Self-Administration service.
This service allows you:
view recent calls.
use click-to-dial service.
manage voicemail (Voice mail number is 2000).
maintain your address book.
set call barring for incoming and outgoing calls.
set your personal alarms.
manage your account password.