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Appendix
Error message
Error message
Cause and remedy
Page
The application
XXXX (process
XXXX) has stopped
unexpectedly. /XXXX
(XXXX) has stopped.
*
Appears when an error is occurred in
the terminal or function. Tap "Force
close"/"OK" and then retry.
-
Mobile networks
cannot use.
The docomo nanoUIM card is not
correctly installed to the terminal. Make
sure that the docomo nanoUIM card is
correctly attached.
Temporarily turned off
by your carrier
Appears when communication is
restricted due to access congestion on
call/communication. Operate again after
the restriction is released.
-
Request to switch to
video call failed.
Appears when switching to video call
fails. Switching is not possible during
emergency call and audio guide, when
the other party is using Catch Phone (call
waiting service), when calling outside the
service area, etc.
Request to switch to
voice call failed.
Appears when switching to voice call
from video call fails due to connection
error, etc. Please wait for a while and try
the operation again.
Make a video START. Appears when making video call fails.
Make sure that you are in service area,
and check the calling mode settings,
settings of mobile network, etc.
Browser has stopped. Appears when an error occurs in the
browser. Tap "OK" and wait for a while,
then retry the operation.
* XXXX indicates app or function name in which an error is occurred.
Updating software
Software update
Download update file for the terminal from the download site on the Internet
and update the software. For software update, there are 2 methods;
connecting to the network directly on the terminal and using Galaxy Smart
Switch PC (P.128) installed to a PC.
Precautions on software update
Software update can be done with the data saved to the terminal remained.
However, note that depending on your terminal condition (malfunction,
damage, water-soaked, etc.), the data may not be protected. You are
recommended to backup the user information and data in the terminal just
in case. However, some data may not be backed up.
• Prepare the following before software update.
- Exit all programs running on the terminal (P.41).
- Charge (P.28) the terminal to make the battery level enough.
• For updating software by connecting the terminal to network directly,
you are recommended to perform in a place with good signal condition,
without moving. When the signal condition is bad, software update may
be interrupted.
• It may take time to update software (download and installation of update
files).
• During installing the update files for software update, all functions
including making/receiving phone call are not available.
• To update the software while you are overseas, connect to Wi-Fi network
(with the docomo nanoUIM card removed).
• When you cannot perform any operations because of the failure of the
software update, please take your terminal to DOCOMO-specified repair
office.
Summary of Contents for Galaxy A21 SC-42A
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