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Hello
I Have 2 Models Of Module Sim900A.
First Module (S2-1040V-Z0958) is 64 MB Flash Version And Default Firmware Is :1137B12SIM900A64_ST
Second Module (S2-1040V-Z095R) is 64 MB Flash Version And Default Firmware Is :1137B02SIM900A64_ST_ENHANCE
since ENHANCE Firmware Support All Function...
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