- 6 -
 ◎ Do not use Quick Switch Adapter (sample) for intended uses 
other than transferring data (charging etc.).
 ◎ Not all data can be transferred.
Using the Product
Before using the product, be sure to read the “Safety Precautions” for 
proper use.
If you think the product may be malfunctioning, first check with the “かん
たん診断 (Quick check)” under “使 い方 サポート (Usage support)” app 
(Japanese).
(https://www.au.com/mobile/service/tsukaikata-support/usage/) 
(Japanese)
 ■ Quick check
*  This service is provided in Japanese.
Operate on the home screen → “App list screen” → [au Service] → [使
い方 サポート] (Usage support) → [診断] (Check)→ [かんたん診断] 
(Quick check).
*  This is available to the customers who contract to au or UQ mobile.
Also refer to “故障とお考えになる前に (Troubleshooting)” in “取扱説明書 
詳細版 (Full Instruction Manual)” (Japanese).
(https://www.au.com/online-manual/shg11/) (Japanese)
(https://www.au.com/support/service/mobile/guide/manual/) 
(Japanese)
 
•
Communication is not possible even inside the service area in places 
where the signal does not reach (e.g. tunnels and basements). Also, 
communication may not be possible in poor reception areas. 
Communication may be interrupted if you move into a poor reception 
areas during communications.
 
•
Since this product uses radio waves, the possibility of communication 
intercepts by third parties cannot be eliminated. (Though the 5G/LTE/
WiMAX 2+/UMTS/GSM system has high security and confidential 
communication features.)
 
•
Only VoLTE (LTE network) can be used when connecting with 
organizations that receive emergency call within Japan.
 
•
The product is compatible with the international roaming service. Each 
network service in this manual varies depending on the area and 
service content.