If you still have access to your old number, you can easily update it yourself in the app:
Open the Kontist mobile app
Go to Settings > Personal data
Tap on Phone number
Request deletion of the old number and add your new one
The change usually takes effect immediately.
You no longer have access to your old number?
No problem – we’ll handle it manually. Please send us the following information via email to support@kontist.com or via chat:
What we need:
Reason for changing your phone number
Proof of the new number, e.g.:
Mobile phone contract
Provider invoice
The proof must include your name and the new phone number and must not be older than 6 weeks.
For prepaid providers (no contract or invoice):
Please send us two photos:
Photo 1: Front of your ID together with the packaging of the prepaid or SIM card, if the number is printed there (not handwritten)
Photo 2: Back of your ID
What happens next?
After review and approval, we’ll delete your old number from the Solaris SE system.
This process usually takes 1–2 business days.
You’ll then receive a push notification on your device and can enter your new number directly in the app.
Why do we need verification?
Your phone number is currently the main verifier for all your transactions and changes in the account. To make sure that the account can be used exclusively by you, it is also necessary to make sure that the number belongs exclusively to you.