thanks my problem solve
Selected model: S5250
Selected com port: COM4
Selected speed port: 921600
Search flash modem ... OK
Search flash modem on:COM79
Send APPS... OK
Send RC1... OK
Send RC2... OK
Send FFS... OK
Send CSC... OK
Send APP... OK
Elapsed time: 532 second, sw ver: 3.5.0032
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