Receiving SMS

Hello All,
How can we send and receive sms in text format and not pdu format? I am
using wavecom gsm modem and made some minor modifications to the smsc_at2.c
file to send sms in text mode (without encoding it to pdu format..). But
problem is with receiving the sms, I belive smsc_at2.c extract the pdu from
the incoming data and tries to decode it and considers all sms coming in to
be in pdu format. Nothing shows up on smsbox.
Any suggestions on how I could avoid changing the code, are there any
variables available that we can set in the smskannel.conf file (maybe I've
missed it). I have the modem set to "AT+CMGF=1" (text mode)
Thank You