Samsung Galaxy A20 Notes On Usage page 36

• Liquid other than water (such as alcohol) adhered to
the product may cause the durability performance
to degrade.
• Do not insert a sharp object into the gap between
the au IC card/microSD memory card tray. Doing
so may damage/deform the product or damage the
rubber gaskets and may allow water to enter the
interior of the product.
• To keep the product waterproof, replacement of
parts is recommended every two years even if
the product is functioning normally. Contact your
nearest au shop for the replacement of parts.
● Heat...resistance...property ...
• Do not soak in boiling water or pour boiling water,
use it in a sauna or apply hot airflow (from a hair
dryer, etc.) to it. The product is not heat resistant.
● Impact...tolerance ...
• The product is not impact-resistant. Do not drop
or apply shock to the product. Do not poke the
receiver, mouthpiece/microphones (upper/lower),
speaker, etc. with a sharp object. Doing so may
damage/deform the product and may allow water to
enter the interior of the product.
Charging
Accessories and optional devices are not waterproof.
Check the following before and after charging.
• Never try to charge the product when the product
is wet. Doing so may cause fire, burns, injuries,
electric shocks, etc.
• Make sure that the product is not wet. To charge
the product after it has been wet, drain the water
thoroughly and wipe any remaining water using dry
clean cloth.
• Do not touch the specified charging equipment
(sold separately) with wet hands. Doing so may
cause electric shock.
• Do not use the specified charging equipment (sold
separately) in a bathroom, shower room, kitchen or
lavatory. Doing so may cause fire, burns, injuries,
electric shocks, malfunction, etc. Do not bring the
product into a bathroom, etc. even when you are not
charging it. Doing so may cause fire, burns, injuries,
electric shocks, malfunction, etc.
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Notes...on...Usage