Du is a service network provider which is proving sim, data, as well as they have internet packages as well and is most commonly used and liked in UAE as its services are well known all over UAE. To Check the balance or the data there are various ways which include going to the nearest store of du outlet , to call on the customer service and take their help, to the easiest of all is either checking it via message or through running the USSD code of the country or of the area your living in and where the number is registered as each country or city have their own USSD codes for checking balance.
To check the balance for a prepaid sim one can type balance and send it to 1355 or they can also call *135# and in either cases they will revive a SMS with their remaining data and balance in their account. Another way is to activate the services for automatic balance update messages which will be sent after every call or text which the user places. Also one can check the data and balance by using online portal of du website by logging into the account using the id and password.
If one is using a post paid sim and want to check the balance they can write rewards and send it to 1233 and they will receive the message with the remaining data and balance. Or check it online just like the prepaid sim users. Du also provides messages to their customers prepaid or post paid when their data limits reach up to the level of 70% to 80% to inform them that their data is about to end and they should be careful or charge again.