When connecting an OPPO A37m in Brom mode, SP Flash Tool typically throws:
Cause: OPPO uses signed DA files. Without an authorized OPPO DA (Download Agent), SP Flash Tool cannot initialize the eMMC. oppo+a37m+sp+flash+tool+top
Typical timing: 4–6 minutes.
Once you see the green checkmark, do NOT disconnect immediately. When connecting an OPPO A37m in Brom mode,
First boot after flash takes 5-10 minutes. Be patient. Cause: OPPO uses signed DA files