: If the phone remains stuck after flashing, try a hard reset by holding the Volume Up and Power buttons to enter recovery mode and selecting Wipe Data/Factory Reset .
: Click on Set Model and select the configuration file named C3520_Citrus_Setting_v00.mdl . samsung gtc3520 flash file and tool
: Click Main Partition , navigate to your downloaded firmware folder, and select the main flash file (often labeled C3520OPEN ). : If the phone remains stuck after flashing,