Nokia N770 Internet Tablet

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have not saved any connections or they are unavailable, you are asked 
to select the connection (Internet access point) you want to use.
In the 
Select connection
 dialog, select a connection from the list, and 
tap 
Connect
. Only available connections are shown, and the 
connections you have saved in your device appear at the top of the list. 
To define the settings of Internet connections and access points, tap 
and select 
Tools
 > 
Control panel
 > 
Connectivity
.
On the 
General
 page, define the following settings:
Connect without asking
 — Select which connections are used without 
asking when connection is needed. This setting applies only to networks 
and connections you have saved in your device.
On the 
Idle times
 page, select the time after which the Internet 
connection ends automatically if the connection is not used. Use 
Packet data idle time
 for packet-switched data connections (such as 
GPRS), 
Data call idle time
 for circuit-switched data calls (such as GSM 
data call), and 
WLAN idle time
 for connections created through a WLAN 
access point.
Note: Time-based charges may apply to the Internet 
connections. Check with your service provider, and adjust the 
idle times accordingly.
Note: The network may also have idle timers that may cause 
the Internet connection to break, regardless of the idle timers of 
the device.
Disable Internet connections
To disable WLAN and Bluetooth connections, briefly press the power 
key, select 
Offline mode
, and tap 
OK
. To enable connections, briefly 
press the power key, select 
Normal mode
, and tap 
OK
.
Note: In the offline mode, you cannot use features that require 
network or Bluetooth connection. To use the features, you must 
first set the device back to normal mode. If the device has been 
locked, enter the lock code.