the power button for 20 seconds, the battery may
be empty. If so, the battery needs longer time to
PIN Code: It is the personal identification number
used to enter SIM and able to prevent others using
SIM card without permission. If the mobile phone
has activated the PIN code protection, when the
mobile phone is switched on, the screen will display
“Input PIN”. In the process of inputting PIN code,
the screen will use “*” to represent the input content.
While obtaining SIM, you can obtain its PIN code.
To change the locked PIN code, you need to use
PUK (Personal Unblocking Key) code. If this code
is not provided together with the SIM card, ask the
local service provider for them.
Tips: If the PIN code is input wrongly for
successively three times, the SIM card will be
locked. Please contact the network operator
immediately for help. Attempt to unlock the code
may make the SIM card ineffective forever!
Charging the mobile phone improperly means
that it can cause to explosion.
Please refer to the related regulations for the
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