Samsung Galaxy Z Fold4 Notes On Usage page 34

■ Main unit
• The battery for the product is built-in and cannot be
replaced by yourself. Please contact the "Inquiries"
in the " 取扱説明書 詳細版 (Full Instruction Manual)"
(Japanese) to replace the battery.
• Do not fold the product in the reverse direction.
Doing so may cause damage to the product.
• Keep the product closed when carrying it in a
bag, etc. Leaving it open may cause scratches or
damage to the main display.
• Never use modified product. Use of a modified
device violates the Radio Law and the
Telecommunications Business Act.
The product is compliant with rules on the
technical standard conformance of specified
wireless equipment based on the Radio Law and
rules on the technology regulatory compliance of
terminal device based on the Telecommunications
Business Act. As proof of this, the "Technical
Conformity Mark
How to confirm: On the home screen, flick up
→ [Settings] → [About phone] → [Regulatory
information]
If the modifications are made to the internal
components, the certification of conformity with
technical regulations will become invalid. Never
use the product without the valid certification.
Doing so violates the Radio Law and the
Telecommunications Business Act.
• Take care not to place magnetized items such as
magnetic cards, speakers and TV sets near the
product, as it might cause malfunction. Putting
a strong magnetism close to the product might
cause false operation.
• Do not bring the product close to magnetized
objects such as cash cards, credit cards, and
prepaid cards. Doing so might result in loss of
recorded information.
• This product has a built-in magnet. Keep this
product away from objects that may be affected
by magnetism (credit cards and medical devices).
Users of medical devices should consult a
physician before using this product.
32
Notes on Usage
" is indicated in the product.