Aravindavaidya
Newbie level 2

I also encountered the same problem!Please get me a way about "an more updated firmware version"
my sim900A version is 1137B08SIM900M64_ST_DTMF_JD_MMS
Thanks a lot
my sim900A version is 1137B08SIM900M64_ST_DTMF_JD_MMS
Thanks a lot