Samsung SGH-U900 Service Manual page 14

Array course control
7. If all connections are ready, click "Download" to start downloading.
Process success message is "All is complete[XXX.Xs]".
8. Recommedations
Don't touch the mobile phone while downloading to prevent disconnecting.
Disconnection while downloading is critical to phone condition.
Main PBA would be damaged by disconnection while downloading.
If all files are downloaded, it is recommended to do full reset.
Full reset : *2767*3855#
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