Nokia C21 User Guide
NETWORK SERVICES AND COSTS
Using some features and services, or downloading content, including free items, require 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 traveling. In these cases, you may not be able to make or receive
calls, send or receive messages or use mobile data connections. Tomake 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 > Mobile network , and switch Preferred network type to
3G .
EMERGENCY CALLS
Important: Connections in all conditions cannot be guaranteed. Never rely solely on any
wireless phone for essential communications like medical emergencies.
Before making the call:
• Switch the phone on.
• If the phone screen and keys are locked, unlock them.
• Move to a place with adequate signal strength.
On the home screen, tap .
1. Type in the official emergency number for your present location. Emergency call numbers
vary by location.
2. Tap .
3. Give the necessary info as accurately as possible. Do not end the call until given permission
to do so.
You may also need to do the following:
• Put a SIM card in the phone. If you don’t have a SIM card, on the lock screen, tap
Emergency .
• If your phone asks for a PIN code, tap Emergency .
• Switch the call restrictions off in your phone, such as call barring, fixed dialling, or closed
user group.
• If the mobile network is not available, you may also try making an internet call, if you can
access the internet.
© 2023 HMD Global Oy. All rights reserved. 37
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