Enter your invite access code and phone number on the login page, then complete OTP verification, or ask an admin to register you directly.
Open Marketplace and use "Apply to Sell". Submit your business details. Admin approval is required before you can list products.
Some channels/groups are set to admin-only posting. Group admins can toggle posting permissions from the group's controls.
Open Help Center → Support to reach the official support lines or email.
Yes. Use Settings → Chats for wallpaper and Settings → Theme for light/dark customization.