+65 country prefix
Singapore phone inputs should handle the +65 prefix and local mobile or landline number patterns without forcing another country format.
Store normalized values with +65 for international workflows.
Allow spaces in display formatting.
Test signup, checkout, SMS verification, and CRM import flows.
Useful QA scenarios
Pair Singapore phone numbers with Singapore addresses to catch validation mismatches across separate form fields.
International phone validation libraries.
Country selector and phone prefix synchronization.
CSV imports that split phone prefix and local number.