You can check your balance via MyDigi app, or by dialing *800#.
Via MyDigi app
1. Log in to the MyDigi App
2. On the Usage page, select 'View Details'
3. Select 'Internet' for Internet roaming quota balance, or select 'Voice' for voice minutes balance
Via dialing *800#
1. Dial *800#
2. Select 1 for 'Check Internet Quota', select 2 for 'Check Voice Minutes'