How to Upgrade Open AT OS ?


#1

I have sdk from distributor.

before
ati3
657_09gg.Q2406B 1954500 102706 18:44
at+wopen=2
at+wopen=2 “OS 3.12”
succesfully upgrade firmware…

ati3
657c_09gg.Q2406B …
at+wopen=2
at+wopen=2 “OS 3.12” -->not change its should be 3.13

how to upgrade Open AT OS ?
which file to download to modem ?
to upgrade firmware its only one file that i downloaded to modem.
657c_full_q2406b…dwl is it correct?

TIA
M. Taufiq