Waiting ADB device... OK Reading phone info... Model: SM-J730F Android version: 8.1.0 PDA version: J730FXXU3BRI3 CSC version: J730FOXA3BRI4 Phone version: Product code: CSC country code: SPAIN CSC sales code: PHE Phone SN: R58K13BGTZW IMEI: HW version: RF cal date: Chip name: EXYNOS7870 Modem board: Security patch: 2018-08-01 Boot Warranty bit: 1 Checking Super user right... true Reading NV data... OK Checking NV data... OK Reading data... OK Detecting MODEM... OK Reading MODEM... OK Calculating... OK Initialization data... OK Rebooting phone... OK Waiting ADB device... OK Waiting for device to become ready... OK Writing zTool... OK Initialization zTool... OK Running zTool, please wait... error (0 ) Initialization zTool... OK Running zTool, please wait... error (0 ) Try downgrade modem if possible