• Always use the web'n'walk Manager for setting up the Internet connection on Windows systems.
• Make sure your web'n'walk Manager software version is up to date (version date appears on the first screen).If you’re using wnw manager CD which was bundled with your handset, there’s no need to check as your handset will be supported.In other cases, make sure the version is not older than your terminal. You can download the newest version of the software from www.t-mobile.cz/sw.

Please note: Some handset models not sold through the T-Mobile distribution are not supported by wnw Manager. For those handset models, as well as for non-Windows systems, please setup the connection manually using instructions found at the end of this document.

This error often occurs when incorrect modem drivers are installed or the handset is set up incorrectly.

• Restart your PC and handset.
• If you use PC Card (PCMCIA) GPRS modem, try to eject and re-insert the card into its slot (you should hear the Plug&Play connection sound).
• Check whether you don’t use any programs, which would try to use the handset/data card at the same time. These would most typically include fax applications or synchronization software.If you use such software, close the application (note that minimizing into tray is not sufficient, it has to be closed).
• Check the communication between your handset and PC using the control panel diagnostics (please see the instructions at the beginning of this section)
• Remove and then re-create the dial-up connection in Windows control panel “Network and dial-up connections”. Check all the connection parameters carefully.
• Uninstall and then re-install the drivers and software of your terminal (remember to re-assign the newly installed modem to the GPRS dial-up connection).

Try the following steps (try connecting again after each step):

• Check whether all the connection parameters in control panels are correct (check the sections for dial-up networking and modems).
• Try decreasing the modem port speed in control panel to 115200 or 57600.
• Check the communication between your handset and PC using the control panel diagnostics (please see the instructions at the beginning of this section)
• Uninstall and then re-install the drivers and software of your GPRS terminal (remember to re-assign the newly installed modem to the GPRS dial-up connection).

The cause of error may be improper setting of:

• APN (please check the modem settings in control panel)
• User name or password (both should be left blank)

Please note: Windows sometimes fills your Windows login into the dial-up networking login window. In such a case, clear the username and password blank before connecting.

Try the following steps (try connecting again after each step):

• Restart your handset and PC
• Make sure you the handset is connected to the same port for which the modem driver was installed (e.g. COM 1)
• If you have changed the hardware configuration of your PC, make sure that the Dial-up networking is configured for the proper modem.
• Check the communication between your handset and PC using the control panel diagnostics (please see the instructions at the beginning of this section). If the query fails,
• • Check whether the serial cable between your PC and handset is firmly connected at both ends.
  • Make sure your serial cable can be used with modem.

Please note: Do not use 9 to 25 pin converters supplied with serial mice. While these converters work with mice, some of them are not capable of carrying the signals needed for modem connection.

• Handset is used by another application which prevents its usage for establishing internet connection. Close all applications (e.g. fax or synchronization software) which could cause the collision.
• Check the modem configuration in the control panel.
• If the problem persists, please use the instructions listed at Error 630.

• Please use the instructions listed at Error 630.

• Make sure you call the proper number and that no calling prefixes or long distance codes are used.
• If you use Nokia handset, enter the APN name in the handset menu. (See the “Installing the web'n'walk Manager” section above for instructions.)

• Configure the modem so that it does not wait for the dialing tone (use Phone and Modem options control panel).
• For users Windows 2000/XP/ista (32/64-bit): Make sure that the dial-up networking uses the correct modem: your GPRS handset or PC card.If you have any other modems installed on your PC, please unselect them so that Windows never tries to use those modems.

• Check the communication between your handset and PC using the control panel diagnostics (please see the instructions at the beginning of this section).
• Is the infrared connection still active?
• Is infrared port linked with the PC?
• Does your handset work when you try to use it with another computer?

• In GPRS connection properties, go to card Security and select the following checkbox: “Allow unsecured password.”
• If you use Nokia handset, enter the APN name in the handset menu. (See the “Installing the web'n'walk Manager” section above for instructions.) 

• Try repairing modem settings:Start > Control panel > Phone and Modem Properties > Modems > choose the right terminal (e.g. PC Card Option Globetrotter) > Properties > Advanced > Extra initialization commands:AT+CGDCONT=1,"IP","internet.t-mobile.cz"
• Check whether the phone number in dial-up networking is:*99***1#
• Make sure that login credentials are not filled. If there’s any text in the login and password field, clear it blank.

Your terminal or PC does not properly communicate with the GSM network. Restart your computer and handset.

• TCP/IP properties of the GPRS connection (Control panel > Network and Dial-up Connections > click right mouse button Properties > Networking > TCP/IP > Properties) must have the following options checked:
• • Obtain IP address automatically
  • Use default gateway of the remote network

The “Use IP header compression” should be however left unchecked.

• If you use SonyEricsson handset, make sure you use proper CID:
  Connectivity > Data communication > Preferred service > GPRS and GSM; Connectivity > Data communication > Data accounts > first position Choose > (CID=1) Edit > APN: internet.t-mobile.cz > User id: blank > Password: blank > Password request: Off > Allow calls: Automatic > IP address: blank > DNS address: blank > Advanced settings > Authentication: Normal > Data compression: Off > Header compression: Off > Quality of Service: do not change.Alternatively, you can add a new data account and based on the CID assigned, you can change the AT command and number dialed.

• If you use Nokia handset, enter the APN name in the handset menu. (See the “Installing the web'n'walk Manager” section above for instructions.) 
  

• Restart your PC and handset.
• Make sure your GPRS service is active (send SMS from your handset containing text GPRS S to number 4603).
• You may have improper GPRS setting (incorrect or absent APN) and/or you use username and password.
• Check the communication between your handset and PC using the control panel diagnostics (please see the instructions at the beginning of this section).
• Check in GPRS modem properties that proper initialization string is used (see Error 734 for details).

• Check the communication between your handset and PC using the control panel diagnostics (please see the instructions at the beginning of this section).
• If you use SonyEricsson handset, make sure you use proper CID in the number dialed. In the default dialed number *99***1#, replace the 1 with currently used CID.
• If you use Bluetooth to connect to your PC, the problem may be in improperly installed Bluetooth device, which should communicate with your handset.