It is useful to know your balance.it will be tracking and this concept also good.
I love to use this application due to checking of balance of sim.it will be much better application to know the balance.we should not go for applying the code which was there based on the network.we can simply entering into the application to know the balances.
Looking nice and features of this application is useful to us.time not consuming and if have a network problem code will not be possible to say about our balance but this application is useful at that time.