Samsung Epic 4G owners who have converted their phones to MTD partition layout can "flash" this in MTD recovery. It temporarily boots CWM5 BML, allowing you to flash modem upgrades without wiping your phones back to BML layout. You may safely ignore the error messages when this CWM starts. This CWM is not written to your phone, so the next time you run recovery it will be MTD CWM.
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