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Need Help with seending SMS ..Modem send nothing ???

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hello every one
i'm using huawei E1552 modem to send SMS from my app.
and bellow is the AT commands procedure to send SMS in the PDU mode and the modem response also, every thing seems ok , but i receive no message at all !!

HTML Code:

AT+CMGF=?

+CMGF: (0-1)

OK

AT+CMGF=0

OK

AT+CSCS=UCS2

OK

AT+CMGF=21

>
0891697408929929F011000A9187510930320004AA086D6F68616D6D6564 & Chr(26)


+CMGS: 47

OK


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