JustCall funktioniert nicht

Get a local or toll-free phone number in any of the 58 countries (including US, UK, Australia, South Africa, Japan, European countries & more) and start making & receiving calls and SMS.  Create and manage your own international call center, helpdesk or global sales team within seconds and minutes.  Empower your sales team to explore global sales opportunities and keep a close and real-time track of their activity and performance.  With in-built CRM, rating system and integrations, you can replace your old-school telephony systems with a new age, scalable and omni-present phone system.  Improve your perception and make your international clients comfortable by providing them with a local number to call.  With a click of button, take your business global.  You don't need any new hardware or cable or sim.  All you need is a diese App account and your phone or computer.