Trojan:SymbOS/Blankfont is a family of SIS file trojans that install a corrupted Font file.
CAUTION This method will remove all data on the device, including calendar and phone numbers
Trojan:SymbOS/Blankfont copies corrupted font files into the phone's memory and thus prevents the phone from loading the valid font files from ROM.
The corrupted font files installed onto the phone will not cause the device to crash, but if the device is rebooted it will then lose the system font and will be unable to display user interface texts.
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