If you really want to flash Nokia Asha 303 here you can download the latest updated flash files of this model. Sometimes your mobile hanging with the reason of many functions at a time. So it is really important to flash or reset the factory of your mobile with its latest flash files. First of all, you will need to download the latest flash files of your mobile then flash them with a micro box. If you haven’t a micro flashing box you can flash all those Nokia mobiles which can support USB data cable you can flash it flashing software phoenix service.