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sim900 upgrade Problem!! with Customer Fash Loader

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Ali_54

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hello, tried to put to module via customer flash loader "1137B03SIM900M64_ST_MMS.cla" and "1137B08SIM900M64_ST_DTMF_JD_MMS.cla"
but both give errors like:
Reception uncomplite
00' 26'' 520 - Err 307 - Error during flash erase
00' 26'' 535 - Err 307 - Error during flash erase

How can I get over this problem?
Please help me

Notice: I m using sim900 EVB evolution board orginally simcom.
SIMCOM-original-SIM900-EVB-development-kit-including-one-piece-SIM900-.jpg


Here is the error
**broken link removed**
 
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