To check your Airtel Night Plan data balance, you can use the following methods:

• Dial USSD code *312# or 312 9#: After dialing, select option 9 for "Data Balance," and your night plan data balance will be sent to you via SMS

• Use the My Airtel App : Download the app from Google Play Store or Apple App Store, log in with your Airtel number, and check your data balance under the "Account" or "Data Balance" section. This gives a detailed view of your night data usage

• Check your phone’s data usage settings : On Android devices, go to Settings > Data Usage > select Airtel NG or Mobile Data Usage. Choose the date corresponding to your night plan subscription to see data consumption details. This method works as a workaround since Airtel does not provide a direct USSD code for night plan balance on all devices

Note that some sources mention dialing *140# to check data balance, but this may not always show night plan data specifically

. In summary, the most straightforward way is dialing *312# and selecting the data balance option or using the Airtel app for a detailed check