Dwa identyczne modemy HUAWEI E3131A wpinane na przemian do TL-WR841ND v.1.1 z OpenWrt AA 12.0.1
Modem nr1:

root@OpenWrt:~# cat /proc/bus/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  1/800 us ( 0%), #Int=  1, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 3.03
S:  Manufacturer=Linux 3.3.8 ehci_hcd
S:  Product=Generic Platform EHCI Controller
S:  SerialNumber=ehci-platform
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  5 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=12d1 ProdID=1506 Rev= 1.02
S:  Manufacturer=HUAWEI
S:  Product=HUAWEI Mobile
C:* #Ifs= 6 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=01 Driver=option
E:  Ad=81(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=16 Driver=(none)
E:  Ad=83(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
I:  If#= 1 Alt= 1 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=16 Driver=(none)
E:  Ad=83(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=02 Prot=03 Driver=option
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=02 Prot=02 Driver=option
E:  Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 4 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 5 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Modem nr 1 łączy się z siecią 3g bez problemu

Oct  3 21:34:05 OpenWrt daemon.notice netifd: WAN_sec (2809): Trying to set mode
Oct  3 21:34:08 OpenWrt daemon.notice pppd[2941]: pppd 2.4.5 started by root, uid 0
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: abort on (BUSY)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: abort on (NO CARRIER)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: abort on (ERROR)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: report (CONNECT)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: timeout set to 10 seconds
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: send (AT&F^M)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: expect (OK)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: AT&F^M^M
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: OK
Oct  3 21:34:09 OpenWrt local2.info chat[2945]:  -- got it
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: send (ATE1^M)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: expect (OK)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: ^M
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: ATE1^M^M
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: OK
Oct  3 21:34:09 OpenWrt local2.info chat[2945]:  -- got it
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: send (AT+CGDCONT=1,"IP","internet"^M)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: timeout set to 30 seconds
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: expect (OK)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: ^M
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: AT+CGDCONT=1,"IP","internet"^M^M
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: OK
Oct  3 21:34:09 OpenWrt local2.info chat[2945]:  -- got it
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: send (ATD*99***1#^M)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: expect (CONNECT)
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: ^M
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: ATD*99***1#^M^M
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: CONNECT
Oct  3 21:34:09 OpenWrt local2.info chat[2945]:  -- got it
Oct  3 21:34:09 OpenWrt local2.info chat[2945]: send ( ^M)
Oct  3 21:34:09 OpenWrt daemon.info pppd[2941]: Serial connection established.
Oct  3 21:34:09 OpenWrt daemon.info pppd[2941]: Using interface 3g-WAN_sec
Oct  3 21:34:09 OpenWrt daemon.notice pppd[2941]: Connect: 3g-WAN_sec <--> /dev/ttyUSB0
Oct  3 21:34:13 OpenWrt daemon.warn pppd[2941]: Could not determine remote IP address: defaulting to 10.64.64.64
Oct  3 21:34:13 OpenWrt daemon.notice pppd[2941]: local  IP address 100.73.0.107
Oct  3 21:34:13 OpenWrt daemon.notice pppd[2941]: remote IP address 10.64.64.64
Oct  3 21:34:13 OpenWrt daemon.notice pppd[2941]: primary   DNS address 213.158.199.1
Oct  3 21:34:13 OpenWrt daemon.notice pppd[2941]: secondary DNS address 213.158.199.5
Oct  3 21:34:13 OpenWrt daemon.notice netifd: Interface 'WAN_sec' is now up
Oct  3 21:34:17 OpenWrt daemon.info dnsmasq[1282]: reading /tmp/resolv.conf.auto
Oct  3 21:34:17 OpenWrt daemon.info dnsmasq[1282]: using nameserver 213.158.199.5#53
Oct  3 21:34:17 OpenWrt daemon.info dnsmasq[1282]: using nameserver 213.158.199.1#53
Oct  3 21:34:17 OpenWrt daemon.info dnsmasq[1282]: using local addresses only for domain lan

Przekładam kartę SIM do modemu nr2

root@OpenWrt:~# cat /proc/bus/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  1/800 us ( 0%), #Int=  1, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 3.03
S:  Manufacturer=Linux 3.3.8 ehci_hcd
S:  Product=Generic Platform EHCI Controller
S:  SerialNumber=ehci-platform
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  7 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=12d1 ProdID=1506 Rev= 1.02
S:  Manufacturer=HUAWEI
S:  Product=HUAWEI Mobile
C:* #Ifs= 6 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=01 Driver=option
E:  Ad=81(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=16 Driver=(none)
E:  Ad=83(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
I:  If#= 1 Alt= 1 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=16 Driver=(none)
E:  Ad=83(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=02 Prot=03 Driver=option
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=02 Prot=02 Driver=option
E:  Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 4 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 5 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Modem nr2 nie łaczy się z siecią 3G (miga zielona dioda)

Oct  3 21:45:09 OpenWrt daemon.notice pppd[3665]: pppd 2.4.5 started by root, uid 0
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: abort on (BUSY)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: abort on (NO CARRIER)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: abort on (ERROR)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: report (CONNECT)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: timeout set to 10 seconds
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: send (AT&F^M)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: expect (OK)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: AT&F^M^M
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: OK
Oct  3 21:45:10 OpenWrt local2.info chat[3669]:  -- got it
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: send (ATE1^M)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: expect (OK)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: ^M
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: ATE1^M^M
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: OK
Oct  3 21:45:10 OpenWrt local2.info chat[3669]:  -- got it
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: send (AT+CGDCONT=1,"IP","internet"^M)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: timeout set to 30 seconds
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: expect (OK)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: ^M
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: AT+CGDCONT=1,"IP","internet"^M^M
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: OK
Oct  3 21:45:10 OpenWrt local2.info chat[3669]:  -- got it
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: send (ATD*99***1#^M)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: expect (CONNECT)
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: ^M
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: ATD*99***1#^M^M
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: CONNECT
Oct  3 21:45:10 OpenWrt local2.info chat[3669]:  -- got it
Oct  3 21:45:10 OpenWrt local2.info chat[3669]: send ( ^M)
Oct  3 21:45:10 OpenWrt daemon.info pppd[3665]: Serial connection established.
Oct  3 21:45:10 OpenWrt daemon.info pppd[3665]: Using interface 3g-WAN_sec
Oct  3 21:45:10 OpenWrt daemon.notice pppd[3665]: Connect: 3g-WAN_sec <--> /dev/ttyUSB0
Oct  3 21:45:11 OpenWrt daemon.notice pppd[3665]: Modem hangup
Oct  3 21:45:11 OpenWrt daemon.notice pppd[3665]: Connection terminated.
Oct  3 21:45:12 OpenWrt daemon.info pppd[3665]: Exit.
Oct  3 21:45:12 OpenWrt daemon.notice netifd: Interface 'WAN_sec' is now down
Oct  3 21:45:15 OpenWrt daemon.notice netifd: WAN_sec (3700): Trying to set mode

Próbowałem zaaplikować zgodnie z opisem na http://eko.one.pl/?p=openwrt-3g

echo "AT^SYSCFG=2,2,3FFFFFFF,1,2" > /dev/ttyUSB0

ale nie pomogło.
Jak sprawdzić czy wszystkie częstotliwości zostały odblokowane ?

Uszkodzony modem nr2 ?

Z góry dziękuję za pomoc
Krzysztof