We would like to inform you that to avoid SMS service charges when withdrawing Rupiah, you can switch to using Authenticator as your security verification method (OTP). In addition to being 100% free, Authenticator is also more secure and practical because the verification code is generated directly from the app on your phone automatically, even when you don't have a mobile network signal. To activate Authenticator on your Indodax account, please follow the instructions in the help guide below: click here 

Once this feature is active, the system will automatically request a code from the Authenticator app every time you make a Rupiah withdrawal, so you will no longer be charged SMS service fees.