I have a Samsung Galaxy Active SGH-I537 and am now getting the IMEI Null error message and baseband version is unknown. I cannot get to the Service Mode, because it is blank. Is there a workaround?Android version: 4.3Kernel version: 3.4.02-2244695se.infra@R0302-03 #1Build numer: JSS15J.I537UCUBML2SE for Android status:EnforcingSEPF_SAMSUNG-SGH-I537_4.3_0016