You have two option to view your data balance using dial codes:
*140#
*140#
Step 1. Dial *140# and press 'Send' or 'Call'.
Step 2. Select '6' Balance Enquiry.
Step 3. Select *4* 4G Data.
Step 4. A pop-up message will appear on your screen with your data balance.
Step 1. Dial *130#.
Your remaining data bundle balance for this period will be displayed on the screen.