Huawei YAL-L21 Quick Start Manual page 6

Getting Started
Do not insert or remove the SIM card when your device
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is powered on.
Ensure that the card is correctly aligned and that the
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card tray is level when you insert it into your device.
Be careful not to scratch your device or hurt yourself
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when using the eject pin.
Store the eject pin out of the reach of children to
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prevent accidental swallowing or injury.
Do not use cut or modified SIM cards with your device
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as these may not be recognized and could damage the
card tray (slot).
If your SIM card does not match your device, please
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contact your carrier.
Follow the instructions in the following figures to set up your
device. Please use the eject pin included.
Single-SIM:
1
2
Dual-SIM:
1
2
3
nano-SIM 1
3
nano-SIM 1
nano-SIM 2
2