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Andreas Mueller andreas.mueller at criticallabs.orgHello, today the UMTS-USB-stick established a successfull IP-connection on the first attempt, but further attempts failed. When comparing packet-dumps of a successful and a failed connection-attempt and looking and the RANAP and GTP-packages I saw, that on the failed connection-attempts the UMTS-Stick is not authorized and on the successful attempt at first a location-update is made and then the authentification, which succeeds. Adding the command "AT+CREG" to wvdial.conf seems to solve the problem. Then I can see an "Routing Area Update Request" which is rejected then the authorization happens (Attach, Identity, Authentication) and the IP-connection is successfully established! Here is a working wvdial.conf for the huawei E1823: [Dialer Defaults] Init1 = AT^U2DIAG=0 Init2 = AT+CREG Init3 = ATZ Init4 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Init5 = AT+CGDCONT=1,"IP","web.blubb.xy" Modem Type = Analog Modem Baud = 9600 New PPPD = yes Modem = /dev/ttyUSB0 Stupid mode = 1 ISDN = 0 Phone = *99# Password = none Username = none It takes very long (>30 seconds) until ppp0 receives the IP-config but afterwards it is working with 6625 kBit/s down- and 580kBit/s upstream. greetings, Andreas