Understanding the Huawei phone software upgrade version. e.g: We have firmware with version GRA-UL10C432B317 It’s Means: GRA-UL10 is Device model C432 is custom region/country/provider version B317 is Build version So this firmware is software upgrade B317 version for Huawei P8 device with model GRA-UL10 Which is marketed in the europe. Huawei CUST Region Provider C00 China C02 Europe Vodafone…