Your first bill is a special case as it includes the Base Plan for two months - the first month of usage pro-rated* and the upcoming month. From your second bill onwards, only the upcoming month’s Base Plan will be included.
Types of Additional Usage Charges
Boost & Auto-Boost
Boost : Charged immediately upon activation
Auto-Boost: Automatically billed when you run out of data and charged in your next bill
Local Talktime & SMS usage outside of your Base Plan
IDD & Global SMS
International Calls, SMS & MMS made and received while in Singapore
Charges for Data, Talktime & SMS usage outside of Singapore if activated
Plus options are optional add-ons to enhance your mobile plan
May be any of the following; Registration fee, Number fee, debit adjustments etc.
For any waivers and reimbursed credits
Successful credit card deductions