With Voice feature enabled [*] and after testing all serial ports, eveything is ok :
- SMS sent -> ok
- SMS Report -> ok
- SMS Received -> ok
- Phone Calls -> ok



my /etc/smsd.conf :
[GSM0] #### HUAWEI E1752 : huawei / E1752 / 11.126.13.00.00 # device = /dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if00-port0 -> Phone Calls -> NOk # device = /dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if03-port0 -> smsd.log :2014-01-17 14:50:24,7, GSM4: Command is sent, waiting for the answer device = /dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if04-port0 init = AT^CURC=0 baudrate = 115200 signal_quality_ber_ignore = yes memory_start = 0 check_memory_method = 2 incoming = yes phonecalls = clip hangup_incoming_call = no report = yes smsc = 336XXXXXXXX

[*]
A use :
- HUAWEI E1752 from Orange, desimlocked (http://wiki.e1550.mobi/doku.php?id=preparation#how_to_unlock_huawei_modems)
- firmware updated : 11.126.03.01.314 -> 11.126.13.00.00 (http://wiki.e1550.mobi/doku.php?id=preparation#update_firmware)
- Voice feature enabled (4€ with with http://www.dc-unlocker.com/)

I change init :

init = AT^CURC=0;^BOOT=0,0

Everything also OK with a HUAWEI E1750 (same firmware).

better :

init = AT^CURC=0;^BOOT=0,0;^U2DIAG=0