Some people need to manually dial USSD codes in order to check the balance of their wireless plan. So XDA Junior Member lspYazan has put together a small application called GSM Check that does this for you. You just need to enter your USSD code once, and the application will keep track of your balance for you. The app shows a notification that you can press to quickly re-dial the USSD code in case you want to know what your balance is at any given time, too.
from xda-developers http://ift.tt/2pqgJ41