Sender ID:
Telefonica Panama (BSC de Panama) (71402) is filtering on Shortcode sender. We recommend you use an international format Numeric sender to bypass this.
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.
Links:
Global SMS Features Overview (Outbound only)
Global SMS Numbers Features Overview