I have an issue using Vodafone 3G enabled SIM cards with Cisco HWIC-3G-GSM in a Cisco 1841, i now have 6 HWIC-3G-GSM card that I cannot use at present due to this issue. If I put a brand new Vodafone sim into a brand new unused Cisco HWIC-3G-GSM card I can establish a connection to the Vodafone 3G network, I obtain an IP address and can access the internet. If I put a brand new Vodafone sim into a Cisco HWIC-3G-GSM that has previously been used with another providers sim card, in this case T-Mobile or Orange, then I cannot establish a connection to the Vodafone 3G network and do not obtain an IP address. If I take the same Cisco HWIC-3G-GSM card that failed with a Vodafone sim, it works fine with T-mobile and Orange. The Vodafone sims that do not work in the Cisco HWIC-3G-GSM do work in a Nokia N95 phone handset. From what i can see its as if the IOS cannot communicate with the modem in the HWIC-3G-GSM card if its been used previously. Im using a Cisco 1841 running c1841-advsecurityk9-mz.124-15.T3.bin, here's the relevant parts of the config I am using: multilink bundle-name authenticated chat-script gsm "" "ATDT*98*1#" TIMEOUT 30 "CONNECT" ! ! interface Cellular0/0/0 description IMEI: ip address negotiated ip mtu 1400 ip virtual-reassembly encapsulation ppp no ip mroute-cache load-interval 30 dialer in-band dialer idle-timeout 0 dialer string "*98*1#" dialer-group 2 async mode interactive no peer default ip address fair-queue ppp chap hostname web ppp chap password 7 111E1C07 ppp ipcp dns request crypto ipsec client ezvpn TFM-3G routing dynamic ! ip route 0.0.0.0 0.0.0.0 Cellular0/0/0 ! dialer-list 2 protocol ip permit ! line 0/0/0 script dialer gsm modem InOut no exec transport input all transport output all Here's the cellular infomation: Hardware Information ==================== Modem Firmware Version = H1_1_8_3MCAP C:/WS/ Modem Firmware built = 03/08/07 Hardware Version = 1.0 International Mobile Subscriber Identity (IMSI) = 234159074726294 International Mobile Equipment Identity (IMEI) = 352678013669772 Factory Serial Number (FSN) = D28056814181035 Modem Status = Online Current Modem Temperature = 26 deg C, State = Normal Profile Information ==================== Profile 1 = INACTIVE* -------- PDP Type = IPv4 Access Point Name (APN) = internet Authentication = CHAP Username: web, Password: web * - Default profile Data Connection Information =========================== Data Transmitted = 0 bytes, Received = 0 bytes Profile 1, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 2, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 3, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 4, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 5, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 6, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 7, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 8, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 9, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 10, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 11, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 12, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 13, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 14, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 15, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Profile 16, Packet Session Status = INACTIVE         Inactivity Reason = Normal inactivate state Network Information =================== Current Service Status = Normal, Service Error = None Current Service = Circuit Switched Packet Service = GPRS Packet Session Status = Inactive Current Roaming Status = Home Network Selection Mode = Automatic Country = GBR, Network = voda UK Mobile Country Code (MCC) = 234 Mobile Network Code (MNC) = 15 Location Area Code (LAC) = 107 Routing Area Code (RAC) = 1 Cell ID = 12007 Primary Scrambling Code = 0 PLMN Selection = Automatic Registered PLMN = vodafone UK , Abbreviated = voda UK Service Provider = Radio Information ================= Current Band = GSM 900, Channel Number = 91 Current RSSI = -110 dBm Band Selected = Auto Modem Security Information ========================== Card Holder Verification (CHV1) = Disabled SIM Status = OK SIM User Operation Required = None Number of Retries remaining = 3 Although profile 1 has the correct APN and chap details i actually wrote this infomation when a T-Moblie sim was in the HWIC-3G-GSM. If I try to write a profile with the Vodafone sim or infact delete the profile the modem does not respond as shown below: 3GRouter#cellular 0/0/0 gsm profile delete 1 Profile 1 will be deleted Are you sure? [confirm] Profile 1 deleted from modem 3GRouter # *Oct 26 14:30:35.876: %CELLWAN-2-SEND_TIMEOUT: Cellular0/0/0 not responding 3GRouter #sh cellular 0/0/0 profile Profile 1 = INACTIVE* -------- PDP Type = IPv4 Access Point Name (APN) = internet Authentication = CHAP Username: web, Password: web * - Default profile 3GRouter #cellular 0/0/0 gsm profile create 2 internet chap web web Profile 2 will be created with the following values: APN = internet Authenticaton = CHAP Username = web Password = web Are you sure? [confirm] Profile 2 written to modem 3GRouter # *Oct 26 14:31:30.909: %CELLWAN-2-SEND_TIMEOUT: Cellular0/0/0 not responding 3GRouter #sh cellular 0/0/0 profile                                 Profile 1 = INACTIVE* -------- PDP Type = IPv4 Access Point Name (APN) = internet Authentication = CHAP Username: web, Password: web * - Default profile  When attempting to dial the debug also indicates that the modem is not responding: 3GRouter #debug dialer events Dial on demand events debugging is on 3GRouter #debug chat Chat scripts activity debugging is on *Oct 26 14:36:33.030: Ce0/0/0 DDR: place call *Oct 26 14:36:33.030: Ce0/0/0 DDR: Dialing cause ip (s=0.0.0.0, d=0.0.0.0) *Oct 26 14:36:33.030: Ce0/0/0 DDR: Attempting to dial *98*1# *Oct 26 14:36:33.030: CHAT0/0/0: Attempting async line dialer script *Oct 26 14:36:33.030: CHAT0/0/0: Dialing using Modem script: gsm & System script: none *Oct 26 14:36:33.030: CHAT0/0/0: process started *Oct 26 14:36:33.030: CHAT0/0/0: Asserting DTR *Oct 26 14:36:33.030: CHAT0/0/0: Chat script gsm started *Oct 26 14:36:33.030: CHAT0/0/0: Sending string: ATDT*98*1# *Oct 26 14:36:33.030: CHAT0/0/0: Expecting string: CONNECT *Oct 26 14:37:03.033: CHAT0/0/0: Timeout expecting: CONNECT *Oct 26 14:37:03.033: CHAT0/0/0: Chat script gsm finished, status = Connection timed out; remote host not responding *Oct 26 14:37:03.033: Ce0/0/0 DDR: disconnecting call As mentioned previously i can take the exact same Cisco 1841, same HWIC-3G-GSM replacing the Vodafone sim with a T-Mobile or Orange sim, use same IOS config and the only thing i change is the APN details in the profile to the relevant providers details and everything works fine. I can take the Vodafone sim that does not work in my used HWIC-3G-GSM card and put it into a brand new unused HWIC-3G-GSM card and it will work fine! I have spoken to Vodafone 3rd line and they have confirmed they have no block, bar, or resriction on IMEI on the sims and and the Vodafone sims I have all work in a Nokia N95 handset. Does anybody know what may be casuing the modem in the HWIC-3G-GSM not to respond? ... View more