For 16.02.2025 Deeplinks:

I tested multiple query parameters, and either one didn't work for Android or it didn't work for IOS, never worked for both.

My approach is, I'm making QR Codes, and will just create 2 separate QRs for Android and IOS.

For me, probably for you too this is how they work: viber IOS -> viber://contact?number=+00000000000 This opens the contact page. Use with '+' prefix.

viber Android -> viber://chat?number=000000000000 This opens the chat page. Use without '+' prefix.