Sender ID:
There are no known restrictions on Sender IDs for SMS to Switzerland.
Content:
There are no additional content restrictions beyond those in our Acceptable Use Policy
Other features/restrictions of note:
Delivery Receipts:
Handset delivery receipts are supported.
Unicode:
Unicode is supported to all networks.
Concatenated messages:
Concatenated messages are supported to all networks.
Links:
Global SMS Features Overview (Outbound only)
Global SMS Numbers Features Overview