Luci-proto-3g do not connect

Hi at all ,
i have installed and configured luci-proto-3g with a qualcomm usb-3g-key
but the connection not work

verifyng the "system-log" i see: "ERROR" after the composition of the number (*99#)

what can it be?

thanks at all

i attach the log of call:

Sat Jan  5 14:08:04 2019 daemon.notice pppd[10677]: pppd 2.4.7 started by root, uid 0
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: abort on (BUSY)
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: abort on (NO CARRIER)
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: abort on (ERROR)
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: report (CONNECT)
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: timeout set to 10 seconds
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: send (AT&F^M)
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: expect (OK)
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: AT&F^M^M
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: OK
Sat Jan  5 14:08:05 2019 local2.info chat[10678]:  -- got it
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: send (ATE1^M)
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: expect (OK)
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: ^M
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: ^M
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: OK
Sat Jan  5 14:08:05 2019 local2.info chat[10678]:  -- got it
Sat Jan  5 14:08:05 2019 local2.info chat[10678]: send (AT+CGDCONT=1,"IP","web.kenamobile.it"^M)
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: timeout set to 30 seconds
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: expect (OK)
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: ^M
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: AT+CGDCONT=1,"IP","web.kenamobile.it"^M^M
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: OK
Sat Jan  5 14:08:06 2019 local2.info chat[10678]:  -- got it
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: send (ATD*99#^M)
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: expect (CONNECT)
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: ^M
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: ATD*99#^M^M
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: **ERROR**
Sat Jan  5 14:08:06 2019 local2.info chat[10678]:  -- failed
Sat Jan  5 14:08:06 2019 local2.info chat[10678]: Failed (ERROR)
Sat Jan  5 14:08:06 2019 daemon.err pppd[10677]: Connect script failed
Sat Jan  5 14:08:07 2019 daemon.info pppd[10677]: Exit.
Sat Jan  5 14:08:07 2019 daemon.notice netifd: Interface '3g' is now down
Sat Jan  5 14:08:07 2019 daemon.notice netifd: Interface '3g' is setting up now

The device is refusing to dial, or the phone company is refusing the connection, or there is no signal.

It usually helps to test modems on a Linux desktop or laptop. Make sure it can connect to the Internet there, and observe the logs to see which drivers are being used.

I tried on a windows pc and it works perfectly,
both the internet connection, the sms and the gsm calls,

unfortunately I'm not very familiar with linux systems,
could you tell me some help ?

login to router via ssh(or uart). find right interface to connect throw
gcom -d /dev/ttyUSB0 or gcom -d /dev/ttyUSB1 or etc