If you're looking for the E1200M flash file, I would suggest checking the following sources:
Remove the battery for 3 seconds, reinsert it, and power on the device. e1200m flash file exclusive
This usually happens if the wrong firmware version was used. Double-check that your file is specifically for the "M" variant If you're looking for the E1200M flash file,
Which version are you currently using?
Flashing will completely wipe all contacts, messages, and call logs. Back up any essential data if the phone is still accessible. Step-by-Step Guide to Flashing the Samsung E1200M e1200m flash file exclusive