Huawei H02231LCY Quick Start Manual page 24

Warning:
1. Your phone supports micro-SIM cards only. Do not use
any other sizes.
2. Do not remove the built-in battery yourself.
3. Power off your phone before installing or removing
microSD or micro-SIM card.
Tips:
To forcibly restart your phone, Press and hold the power
button until your phone vibrates.This may take about 15
seconds.
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