Usar la aplicación APKPure
Obtener Sim Help BD versión histórica en Android
Esta aplicación le ayudará a utilizar la tarjeta SIM de móvil muy fácilmente
This Application provides you some important USSD code for all Bangladeshi sim except Citycell.After running the app just choose your option and perform your expected operation.If you face any problem,please let me know by giving your feedback.Your inspiration is my power .It will make me useful to do something better