See it work
Build the link a Zürich client will tap
Pick a sample: your Indian number, a bar, and the first line a Zürich client should see in their chat box. The output is the link for your German-language page.
A click-to-chat link has two parts: the number, written as digits only with the country code and nothing else, and an optional message that pre-fills the client's chat box. German text carries umlauts, so the message must be URL-encoded as UTF-8; a link built by pasting the text in raw breaks in some browsers and email clients.
The link only starts the conversation. The client still presses Send, and because they wrote first, a 24-hour window opens in which your team can reply freely. Each reply is a service message billed at the rate for the client's +41 number.
If a Swiss partner wants their own number in the link, they must write it in full with 41 in front. 079 000 00 00, as typed on a Swiss business card, gives a converter nothing to go on.