Check Your Balance
You can now check your account balance online. All you need is your 15 digit MEID/ESN number.
How to obtain your MEID/ESN number
On almost all devices, you can obtain your MEID number by dialling *#06#
It can also be obtained on Android devices by navigating to Settings > About Phone > Status > IMEI.
On iPhones, the MEID(IMEI) can be obtained by connecting the device to iTunes.