For (Residential line)

• Call us at hotline 1609
• Walk in to any SingTel Customer Service Counters
• Fax to (65) 6796 1767 
• Write in to:
  Singapore Telecommunications Ltd
  Consumer Business Support - Telephony
  Orchard Road P.O. Box 309
  Singapore 912311

For (Business line)

• Walk in to any SingTel Customer Service Counters
• Fax to (65) 6477 9372
• Write in to:
  Singapore Telecommunications Ltd
  General Business Support
  Orchard Road P.O. Box 398
  Singapore 912314