What is Changi Mobile? What Changi Mobile’s mobile plans are available? Sign Up & Data Collection Payment & Billing SIM Delivery/Pick-up Port-in My Number to Changi Mobile Usage and Add-ons Change Plan Promotions IDD Roaming Technical Corporate Individual Scheme Spam Calls OTP SMS related issues Call Forwarding Plan Rollover Add-on Stored Credits 3G Service has ended Changi Mobile Prepaid Tourist SIM Blocking of incoming international calls and SMS