Nokia 5228 - Manual (Page 28)

Antenna locations
Your device may have internal and external antennas. Avoid touching the antenna
area unnecessarily while the antenna is transmitting or receiving. Contact with
antennas affects the communication quality and may cause a higher power level
during operation and may reduce the battery life.
Cellular antenna
Bluetooth antenna
Offline profile
The offline profile lets you use the device without connecting to the wireless cellular
network. When the offline profile is active, you can use your device without a SIM
card.
Activate the offline profile — Press the power key briefly, and select Offline.
When you activate the offline profile, the connection to the cellular network is
closed. All radio frequency signals to and from the device to the cellular network
are prevented. If you try to send messages using the cellular network, they are
placed in the Outbox folder to be sent later.
Important: In the Offline profile you cannot make or receive any calls, or use
other features that require cellular network coverage. Calls may still be possible to
Your device
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