Mio A501 - Manual (Page 195)

Troubleshooting and Maintenance
11-7
Modem Connection Problems
Unable to dial out
Make sure that the modem card is inserted correctly.
Able to dial out but unable to make a proper connection
Make sure that the network you are trying to connect supports the
Point-to-Point Protocol (PPP). Your ISP or network administrator can
verify this.
Make sure that your dialing location is correct.
Make sure that the phone number you are trying to reach is correct.
Modem connection is unreliable
Make sure that the modem card is inserted correctly.
Network Connection Problems
Make sure that the network card is compatible with the device.
In the properties for your network card, make sure that you have
correctly configured the IP settings, and the addresses of your DNS
servers and/or WINS servers. Your network administrator can verify
this.
If Network Connection is not listed as a connection method in the
ActiveSync dialog box when starting synchronization, wait a few
minutes and try again. Also, if synchronization does not start right away,
the network is probably busy, and it may take a minute for the device to
connect to the network.
Verify with your network administrator that your user name and
password are correct.
Verify with your network administrator that the network you are trying
to connect to is available, to try to connect to it from another computer.