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Google Nexus 5X users are reporting that the
smartphone has a pesky problem when it's
charged with the USB Type-C charger and
cable that are included in the retail box: the
handset's touchscreen can often become laggy,
or unresponsive.
According to discussions over at the Google
Nexus Help Forums, Reddit and XDA, it seems
that the problem isn't the touchscreen itself,
but the fact that the charger that the Nexus 5X
comes with has a plastic-made grounding pin,
instead of a metal-made one.
When the 5X is charged with a USB Type-A to
USB Type-C charger, everything works fine
(however, in this case, the handset won't be
charged as fast as with a genuine USB Type-C
cable).
It appears that most of the Nexus 5X units
affected by the problem are manufactured in
September, though some owners of units
manufactured in October are also complaining
about this. You can check the month when
your Nexus 5X was manufactured by looking at
its retail box and searching for the serial
number (S/N): if it starts with 509 it means it's
from September, 510 means it's from October,
and 511 means it's from November (obviously,
5 is the manufacturing year - 2015 - while the
other two digits represent the month).
source : Some (many?) Google Nexus 5X units have touchscreen issues when charging