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Problem Possible causes Possible solution
Poor signal.
Move to an open space, or if
you are inside a building, move
closer to a window.
PIN Code
blocked
You have entered an
incorrect PIN code three
consecutive times.
Contact your service provider.
If the service provider provides
the nano-SIM card’s PUK
code, use the PUK code to
unlock the nano-SIM card.
Phone crashes,
reboots, freezes,
or cannot be
powered on
Some third-party software is
not compatible with your
phone.
Uninstall the software that may
be causing the problem.
Upgrade the phone software.
Reset the phone to factory
status.
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