Try the bin file for your modem from the TP-LINK website.

Hello, I'm not trying to hijack the thread but I'm having a similar problem and I don't know if it was resolved in your case.

I have tried this Modem:
ZTE MF190
Provider: Claro
Region: Nicaragua

and I have not been successful. I have tried that modem with these devices and firmwares:

MR 3420 Hardware v1
Firmware Version: 3.12.21 Build 120523 Rel.37880n

------------------------------------
MR3040
Firmware Version:
3.14.2 Build 120822 Rel.40902n

-------------------------
MR3420 - Hardware v2

Firmware Version:
3.13.24 Build 120703 Rel.55807n
---------------------------------

MR3420 - Hardware v2
Firmware Version:
3.13.27 Build 120905 Rel.73281n0

I have tried many bin files for the MF190 also and have not had success. It seems the modem is recognized but it is unable to connect to the network. In one particuar case, it connected after 30 minutes but I have not been able to reproduce this result.

Thanks in advance for any insight in this matter.

This is the log from the router, I hope it helps
Some repeated messages were deleted due the character limit for posts.

####################################################################
# TL-MR3420 System Log
# Time = 2012-01-01 0:22:32 1353s
# H-Ver = MR3420 v2 00000000 : S-Ver = 3.13.27 Build 120905 Rel.73281n
# L = 192.168.0.1 : M = 255.255.255.0
# 3G/4G : 3G/4G = 0.0.0.0 : M = 0.0.0.0 : G = 0.0.0.0
####################################################################

1st day 00:16:20 3G/4G NOTICE 967: Before judgeModemTypeByTargetID, index = -1, targetPid = 0x0017
1st day 00:16:20 3G/4G NOTICE After judgeModemTypeByTargetID, modem type = 0
1st day 00:16:20 3G/4G INFO LTE Modem = 0, modemStatus = 2, targetVendorID = 0x19d2, targerProductID = 0x0017
1st day 00:16:20 3G/4G INFO USB modem is ready
1st day 00:16:20 3G/4G NOTICE manualConf = 1, return
1st day 00:16:39 3G/4G NOTICE manualConf = 1, return
1st day 00:16:40 3G/4G NOTICE parseResponseBuf 245 Respone data is: at+CSQ^M^M +CSQ: 28,99^M ^M OK^M , len = 28
1st day 00:16:40 PPP NOTICE Standard authentication.
1st day 00:16:40 3G/4G INFO Run 3G dial cmd: pppd 3g 1 /dev/ttyUSB1 115200 connect "chat -s -v -f /etc/ppp/c
1st day 00:16:41 PPP INFO chat:get_string : OK
1st day 00:16:41 PPP INFO chat:get_string : CONNECT
1st day 00:16:41 PPP INFO chat:terminate: status == 0
1st day 00:16:42 PPP INFO sent [LCP Req mru=1480 asyncmap=0x0 magic=0x58e82de4]
1st day 00:16:45 PPP INFO sent [LCP Req mru=1480 asyncmap=0x0 magic=0x58e82de4]
1st day 00:16:48 PPP INFO sent [LCP Req mru=1480 asyncmap=0x0 magic=0x58e82de4]
1st day 00:16:51 PPP INFO sent [LCP Req mru=1480 asyncmap=0x0 magic=0x58e82de4]
1st day 00:16:54 PPP INFO sent [LCP Req mru=1480 asyncmap=0x0 magic=0x58e82de4]
1st day 00:17:12 PPP INFO chat:terminate: status == 0
1st day 00:17:12 3G/4G NOTICE manualConf = 1, return
1st day 00:17:15 3G/4G NOTICE manualConf = 1, return
1st day 00:17:19 3G/4G NOTICE manualConf = 1, return
1st day 00:17:32 3G/4G NOTICE parseResponseBuf 245 Respone data is: at+CSQ^M^M +CSQ: 28,99^M ^M OK^M , len = 28
1st day 00:17:32 PPP NOTICE Standard authentication.
1st day 00:17:32 3G/4G INFO Run 3G dial cmd: pppd 3g 1 /dev/ttyUSB2 115200 connect "chat -s -v -f /etc/ppp/c
1st day 00:17:33 PPP INFO chat:get_string : OK
1st day 00:17:33 PPP INFO chat:get_string : OK
1st day 00:17:33 PPP INFO chat:get_string : OK
1st day 00:17:33 PPP INFO chat:terminate: status == 6
1st day 00:17:34 3G/4G NOTICE manualConf = 1, return
1st day 00:17:37 3G/4G NOTICE manualConf = 1, return
1st day 00:17:39 3G/4G NOTICE manualConf = 1, return
1st day 00:17:41 3G/4G NOTICE manualConf = 1, return
1st day 00:17:53 3G/4G NOTICE Now disconnect times is 1
1st day 00:17:53 3G/4G NOTICE 3G Modem connecting error, please check the dial number and APN.
1st day 00:17:53 3G/4G INFO sw3GMobileCmdReq 378 mobileFormatCmd error
1st day 00:17:55 3G/4G NOTICE manualConf = 1, return
1st day 00:17:57 3G/4G NOTICE manualConf = 1, return
1st day 00:17:59 3G/4G NOTICE manualConf = 1, return
1st day 00:18:16 PPP NOTICE Standard authentication.
1st day 00:18:16 3G/4G INFO Run 3G dial cmd: pppd 3g 1 /dev/ttyUSB1 115200 connect "chat -s -v -f /etc/ppp/c
1st day 00:18:33 PPP INFO chat:terminate: status == 3
1st day 00:18:34 3G/4G NOTICE manualConf = 1, return
1st day 00:18:36 3G/4G NOTICE manualConf = 1, return
1st day 00:18:38 3G/4G NOTICE manualConf = 1, return
1st day 00:18:54 3G/4G NOTICE parseResponseBuf 245 Respone data is: at+CSQ^M^M +CSQ: 28,99^M ^M OK^M , len = 28
1st day 00:18:54 PPP NOTICE Standard authentication.
1st day 00:18:54 3G/4G INFO Run 3G dial cmd: pppd 3g 1 /dev/ttyUSB2 115200 connect "chat -s -v -f /etc/ppp/c
1st day 00:18:55 PPP INFO chat:get_string : OK
1st day 00:18:55 PPP INFO chat:get_string : OK
1st day 00:18:55 PPP INFO chat:get_string : OK
1st day 00:18:55 PPP INFO chat:terminate: status == 6
1st day 00:18:56 3G/4G NOTICE manualConf = 1, return
1st day 00:18:58 3G/4G NOTICE manualConf = 1, return
1st day 00:19:00 3G/4G NOTICE manualConf = 1, return
1st day 00:19:15 3G/4G NOTICE Now disconnect times is 2
1st day 00:19:15 3G/4G NOTICE 3G Modem can't connect to network, now reset itself to try connecting again.
1st day 00:19:15 3G/4G NOTICE Reset the 3G modem, please wait.
1st day 00:19:15 3G/4G NOTICE handle_card start
1st day 00:19:15 3G/4G INFO LTE Modem = 0, modemStatus = 1, targetVendorID = 0x0000, targerProductID = 0x0000
1st day 00:19:17 3G/4G INFO sw3GMobileCmdReq 378 mobileFormatCmd error
1st day 00:19:17 3G/4G INFO LTE Modem = 0, modemStatus = 0, targetVendorID = 0x0000, targerProductID = 0x0000
1st day 00:19:19 3G/4G INFO 3G Modem is plugged out.
1st day 00:19:22 3G/4G NOTICE handle_card start
1st day 00:19:22 3G/4G INFO LTE Modem = 0, modemStatus = 1, targetVendorID = 0x0000, targerProductID = 0x0000
1st day 00:19:31 3G/4G INFO Before Mode switch VendorID = 0x19d2, ProductID = 0x2000
1st day 00:19:40 3G/4G INFO After mode switch vendorID = 0x19d2, productID = 0x0017
1st day 00:19:40 3G/4G NOTICE 803: Before judgeModemTypeByTargetID, index = -1, targetPid = 0x0017
1st day 00:19:48 PPP INFO chat:terminate: status == 3
1st day 00:19:53 PPP INFO chat:terminate: status == 3
1st day 00:20:05 PPP INFO chat:terminate: status == 0
1st day 00:20:06 PPP INFO chat:terminate: status == 0
1st day 00:20:06 3G/4G INFO Main interface_index[0] = 1
1st day 00:20:06 3G/4G INFO Vice interface_index[1] = 2
1st day 00:20:07 3G/4G NOTICE After mode switch vendorID is 0x19d2 productID is 0x0017
1st day 00:20:08 3G/4G INFO getModemPinStatus 1347 getModemParamByScript return valid type = 1
1st day 00:20:08 3G/4G INFO card_add 962 minfo.modeswitchcmd = /tmp/3G/19d2_2000_0 minfo.simLock = 16, minfo.modemChipTyp = 1
1st day 00:20:08 3G/4G NOTICE 967: Before judgeModemTypeByTargetID, index = -1, targetPid = 0x0017
1st day 00:20:08 3G/4G NOTICE After judgeModemTypeByTargetID, modem type = 0
1st day 00:20:08 3G/4G INFO LTE Modem = 0, modemStatus = 2, targetVendorID = 0x19d2, targerProductID = 0x0017
1st day 00:20:08 3G/4G INFO USB modem is ready
1st day 00:20:08 3G/4G NOTICE manualConf = 1, return
1st day 00:20:10 3G/4G NOTICE manualConf = 1, return
1st day 00:20:14 3G/4G NOTICE manualConf = 1, return
1st day 00:20:28 3G/4G NOTICE parseResponseBuf 245 Respone data is: at+CSQ^M^M +CSQ: 28,99^M ^M OK^M , len = 28
1st day 00:20:28 PPP NOTICE Standard authentication.
1st day 00:20:28 3G/4G INFO Run 3G dial cmd: pppd 3g 1 /dev/ttyUSB1 115200 connect "chat -s -v -f /etc/ppp/c
1st day 00:20:29 PPP INFO chat:get_string : OK
1st day 00:20:29 PPP INFO chat:get_string : OK
1st day 00:20:29 PPP INFO chat:get_string : OK
1st day 00:20:29 PPP INFO chat:get_string : CONNECT
1st day 00:20:29 PPP INFO chat:terminate: status == 0
1st day 00:20:30 PPP INFO sent [LCP Req mru=1480 asyncmap=0x0 magic=0x9de8c331]
1st day 00:20:33 PPP INFO sent [LCP Req mru=1480 asyncmap=0x0 magic=0x9de8c331]
1st day 00:21:00 PPP INFO chat:terminate: status == 0
1st day 00:21:00 3G/4G NOTICE manualConf = 1, return
1st day 00:21:03 3G/4G NOTICE manualConf = 1, return
1st day 00:21:19 3G/4G NOTICE manualConf = 1, return
1st day 00:21:20 3G/4G NOTICE parseResponseBuf 245 Respone data is: at+CSQ^M^M +CSQ: 28,99^M ^M OK^M , len = 28
1st day 00:21:20 PPP NOTICE Standard authentication.
1st day 00:21:20 3G/4G INFO Run 3G dial cmd: pppd 3g 1 /dev/ttyUSB2 115200 connect "chat -s -v -f /etc/ppp/c
1st day 00:21:21 PPP INFO chat:get_string : OK
1st day 00:21:21 PPP INFO chat:get_string : OK
1st day 00:21:21 PPP INFO chat:terminate: status == 6
1st day 00:21:23 3G/4G NOTICE manualConf = 1, return
1st day 00:21:25 3G/4G NOTICE manualConf = 1, return
1st day 00:21:27 3G/4G NOTICE manualConf = 1, return
1st day 00:21:41 3G/4G NOTICE Now disconnect times is 1
1st day 00:21:41 3G/4G NOTICE 3G Modem connecting error, please check the dial number and APN.
1st day 00:21:41 3G/4G INFO sw3GMobileCmdReq 378 mobileFormatCmd error
1st day 00:21:43 3G/4G NOTICE manualConf = 1, return
1st day 00:21:45 3G/4G NOTICE manualConf = 1, return
1st day 00:21:47 3G/4G NOTICE manualConf = 1, return
1st day 00:21:49 3G/4G NOTICE manualConf = 1, return
1st day 00:22:04 PPP NOTICE Standard authentication.
1st day 00:22:04 3G/4G INFO Run 3G dial cmd: pppd 3g 1 /dev/ttyUSB1 115200 connect "chat -s -v -f /etc/ppp/c
1st day 00:22:21 PPP INFO chat:terminate: status == 3
1st day 00:22:22 3G/4G NOTICE manualConf = 1, return
1st day 00:22:24 3G/4G NOTICE manualConf = 1, return

try latest firmware; try binfile.
I also get the following method from the website

Step 1: Plug the 3G modem to your computer.

Step 2: (On Windows XP) clickStart->go to All programs->Accessories->Communications->HyperTerminal->choose the corresponding COM port for the 3G mode

Connection parameters are:

Bits per Second: 115200

Data bits: 8

Parity: None

Stop bits: 1

Flow Control: None

Once connected, type the following command and you would get a message telling you the operation successful, and then exit Hyper Terminal.
AT+ZCDRUN=8
Connect the 3G modem back to the router and restart the router, then check the 3G section to see whether itwould be recognized or not.

Thank you! I have been looking for that command for a long time. I had some modems that were not recognized and I wanted to try to disable that.

Unfourtanely the problem I have is that the modem is recognized by the router but it is unable to make a connection.

What I see in the the system log after the router tries to connect is this:


INFO sw3GMobileCmdReq 378 mobileFormatCmd error

I believe it's not a configuration error because I insert the same SIM card in another modem without changing any configuration in the router and it works without a problem.

Have you tried to manually fill in the correct APN and dial number within the 3G part? I catch a massage in the log:
1st day 00:21:41 3G/4G NOTICE 3G Modem connecting error, please check the dial number and APN.

Yes, I have tried it. In fact if I insert another modem to the router using the same SIM card without changing any APN or dial number configuration in the router it works. So the APN and dial number are correct.

Very strange.

Any luck .I have the similar problem. MR3020 is not working with ZTE MF190

Hi,

Good news.

We now have a BlackWidow release that fully supports the many TP-Link USB routers and most recently the MR3420 V2 and the ZTE MF821D, Huawei E3276 and other late model USB modems. It may recognise many other 3G and 4G modems as it has many different USB connection protocols in-built, unlike the stock TP-Link firmware.

Follow the links from the Whirlpool WIKI.

A couple of words of warning for users with the E3276 (and other late model 3G/ 4G modems), that we have found along the way:

1. The E3276 may under some conditions (generally low signal levels), draw more power than the router can provide. This may lead to unstable performance and connection. The solution is a USB Y - Cable and an additional USB 5v supply.

2. The E3276 may under certain conditions require a USB cable with ferrite bead 'interference isolation' to ensure stable operation.

Cheers

John k

PS Please report back with your performance results and please drop into the BlackWidow support thread HERE as there are many exciting developments on the way. We know there are many downloads of this software from all over the world, so we would love to hear the feed-back.

Wahroonga Farm wrote

Hi,

Good news.

We now have a BlackWidow release that fully supports the many TP-Link USB routers and most recently the MR3420 V2 and the ZTE MF821D, Huawei E3276 and other late model USB modems. It may recognise many other 3G and 4G modems as it has many different USB connection protocols in-built, unlike the stock TP-Link firmware.

Follow the links from the Whirlpool WIKI.

A couple of words of warning for users with the E3276 (and other late model 3G/ 4G modems), that we have found along the way:

1. The E3276 may under some conditions (generally low signal levels), draw more power than the router can provide. This may lead to unstable performance and connection. The solution is a USB Y - Cable and an additional USB 5v supply.

2. The E3276 may under certain conditions require a USB cable with ferrite bead 'interference isolation' to ensure stable operation.

Cheers

John k

PS Please report back with your performance results and please drop into the BlackWidow support thread HERE as there are many exciting developments on the way. We know there are many downloads of this software from all over the world, so we would love to hear the feed-back.

Thank you for destroy my router
its not accept any thing after I install your software . even lan cable not accept
now my router only do flasher lights . all green lights fashing
do you have any idea how to install the orgenal tp-link software . dont forget , no wifi or lan work