You can check your prepaid balance via:
Online Self Service
Simply login to your account to view your prepaid balance on the main page.
SMS
SMS 000<space>12-Digit-Smartcard to 33310</space>
Example: 000 012345678910
* Standard telco charges and Terms and Conditions apply for all SMS
NJOI Prepaid WhatsApp
Step 1: Send Hi to the NJOI WhatsApp number (03 9543 8100)
Step 2: Key-in 1 for Credit balance & Top Up