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Nokia T21 User Guide
NETWORK SERVICES AND COSTS
Using some features and services, or downloading content, including free items, requires a
network connection. This may cause the transfer of large amounts of data, which may result
in data costs. You may also need to subscribe to some features.
Important: 4G/LTE might not be supported by your network service provider or by the service
provider you are using when travelling. In these cases, you may not be able to make or receive
calls, send or receive messages, or use mobile data connections. To make sure your device
works seamlessly when full 4G/LTE service is not available, it is recommended that you
change the highest connection speed from 4G to 3G. To do this, on the home screen, tap
Settings > Network & Internet > SIMs and switch Preferred network type to 3G .
Note: Using Wi-Fi may be restricted in some countries. For example, in the EU, you are only
allowed to use 5150‑5350 MHz Wi-Fi indoors, and in the USA and Canada, you are only allowed
to use 5.15‑5.25 GHz Wi-Fi indoors. For more information, contact your local authorities.
For more information, contact your network service provider.
TAKE CARE OF YOUR DEVICE
Handle your device, battery, charger, and accessories with care. The following suggestions help
you keep your device operational.
• Keep the device dry. Precipitation,
humidity, and all types of liquid or
moisture can contain minerals that
corrode electronic circuits.
• Do not use or store the device in dusty or
dirty areas.
• Do not store the device in high
temperatures. High temperatures may
damage the device or battery.
• Do not store the device in cold
temperatures. When the device warms to
its normal temperature, moisture can form
inside the device and damage it.
• Do not open the device other than as
instructed in the user guide.
During extended operation, the device may feel warm. In most cases, this is normal. To avoid
getting too warm, the device may automatically slow down, dim display during a video call,
close apps, switch off charging, and if necessary, switch itself off. If the device is not working
properly, take it to the nearest authorised service facility.
© 2022 HMD Global Oy. All rights reserved.
• Unauthorised modifications may damage
the device and violate regulations
governing radio devices.
• Do not drop, knock, or shake the device or
the battery. Rough handling can break it.
• Only use a soft, clean, dry cloth to clean
the surface of the device.
• Do not paint the device. Paint can prevent
proper operation.
• Keep the device away from magnets or
magnetic fields.
• To keep your important data safe, store
it in at least two separate places, such as
your device, memory card, or computer, or
write down important information.
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- Quick Links:
- Insert the Sim and Memory Cards
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