I have legacy module Q2403A (from ATI3), but unfortunately i can’t programme the module. 
Does anybody has experience to programme this module? What is the SDK version?
Any help will be appreciated.
--- device information ---
ATI :
WAVECOM MODEM
MULTIBAND 900E 1800
ATI3 :
641c09gg.Q2403A 1320668 070705 10:58
ATI6 :
DATA RATES: AUTOBAUD,300,1200,1200/75,2400,4800,9600,14400
DATA MODES: T/NT,ASYNCHRONOUS
FAX CLASS: 1,2
ATI7 :
SPEECH CODINGS: FR,EFR,HRdoes it respond to AT+WOPEN=2
Yes
AT+WOPEN=2
+WOPEN: 2,"AT v02.10"
OKAnd also this response appear when port opened at first time on M2M Studio (maybe this detail help)
+WIMEI: 351099810556438
+WOPEN: (0-4)
+WOPEN: 1
641c09gg.Q2403A 1320668 070705 10:58
a04_3ugg.Q2403A 0001002C8F5DC7EA
+WOPEN: 2,"AT v02.10"
+WDWL: V02.1GAny further suggestion awneil ?
That tells you that it has Open-AT v2.10.
And that tells you that it is programmable, and that you need an SDK comatible with Open-AT v2.10 - which, I guess, must be well over 7 years old…