Smart Phone Flash Tool -runtime Trace Mode- V4.8.0 -

[Trace Start] -> [BROM Handshake] -> [DA Initialization] -> [Storage Partitioning] -> [Data Write Blocks] -> [Trace End] 1. BROM Connection Phase

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The issue is a communication failure, driver issue, or a damaged preloader. [Trace Start] -> [BROM Handshake] -> [DA Initialization]