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Solution 2:
Power the phone on again.
Solution 3:
Is the phone in Airplane mode? To check that
Airplane mode is canceled, open the Settings app, tap
Network & Internet
, and check the Airplane mode switch.
Solution 4:
Is data communication disabled? To check
that data communication is enabled, open the Settings app,
tap
Network & Internet > Mobile network
, and check the
Data Enabled slider.
Solution 5:
Is a disabled data access point set? You can
open the Settings app, tap
Network & Internet > Mobile
networks > Access Point Names >
the icon of 3
vertical dots
> Reset to default
to restore the initial APN
settings.
Problem:
Battery level goes down quickly.
Solution:
Are you where signal is weak or have been out
of service area for a long period? Calling where signal is
weak or being out of service area uses a lot of battery.
Problem:
Cannot install applications.
Solution:
Applications cannot be installed with only a little
free space on the phone or portable storage. To check free
space, see
Storage
. Applications not supported by your
phone cannot be installed either.
Problem:
Cannot unlock screen.
Solution:
Power the phone on again. If you are unable to
turn the phone off, press and hold the
Power/Lock
key for
about 10 seconds to restart the phone. Data that was
being edited is erased after the phone is powered on
