I Cannot Connect To A Wireless Network - Blackberry 8820 SMARTPHONE User Manual

Display troubleshooting
My device screen turns off
When you do not use your BlackBerry® device for a period of time, the screen turns off to conserve battery power.
To turn on the screen, click the trackball or press a key.
My display changed
Depending on your theme, display options, such as your font and Home screen background, might change when you switch themes.
Language troubleshooting
Some characters do not appear correctly on my device
The BlackBerry® Enterprise Server or BlackBerry® Internet Service that is associated with your BlackBerry® device might not support the
characters. For more information, contact your wireless service provider or administrator.
Wireless network coverage troubleshooting

I cannot connect to a wireless network

Try performing the following actions:
• Verify that your SIM card is inserted in your BlackBerry® device correctly.
• Verify that you have turned on the connection to the wireless network.
• Verify that you are connected to your wireless service provider's network. If you switched wireless networks manually, your
device remains connected to that wireless network until you select your wireless service provider's network again.
• If your wireless service provider supports UMA, verify that your connection preference is not set to Wi-Fi Only.
Security troubleshooting
I cannot download a certificate
If you changed the connection type that your BlackBerry® device uses to connect to the LDAP certificate server, try switching to the default
connection type.
I cannot unlock my device using my smart card
Try performing the following actions:
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