Module No. 5710
Troubleshooting
I can’t pair the watch with a phone.
Q1I’ve never been able to establish a (pairing) connection between the watch and phone.
Are you using a supported phone model?
Check if the phone model and its operating system are supported by the watch.
For information about supported phone models, visit the CASIO Website.
Did you install the CASIO WATCHES phone app on your phone?
The CASIO WATCHES phone app needs to be installed on your phone in order to connect with the watch.
Install the app on your phone.Are your phone’s Bluetooth settings configured correctly?
Configure the phone’s Bluetooth settings. For details about setting procedures, see your phone documentation.
iPhone Users
“Settings” 
“Bluetooth” On
“Settings” “Privacy” “Bluetooth” “CASIO WATCHES” On
Android Users
Enable Bluetooth.
Other than the above.
Some phones need to have BT Smart disabled to use CASIO WATCHES. For details about setting procedures, see your phone documentation.
On the Home Screen, tap: “Menu” “Settings” “Bluetooth” “Menu” “BT Smart settings” “Disable”.
I can’t reconnect the watch and phone.
Q1The watch will not re-connect with the phone after they are disconnected.
Is the CASIO WATCHES phone app running?
The watch cannot re-connect with your phone unless CASIO WATCHES is running on the phone. On your phone’s Home Screen, tap the “CASIO WATCHES” icon. Next, on the watch, hold down (C) for at least three seconds.
Have you tried turning your phone off and then back on again?
Turn your phone off and then back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (C) for at least three seconds.
Is a timer countdown operation in progress?
Connection with a phone is not possible while there is 30 seconds or less remaining on a countdown timer operation. Stop the countdown operation before connecting with the phone.
Q2I can’t connect while my phone is in the Airplane Mode.
Connection with the watch is not possible while the phone’s Airplane Mode is enabled. After disabling the phone’s Airplane Mode, go to the phone’s Home Screen and tap the “CASIO WATCHES” icon. Next, on the watch, hold down (C) for at least three seconds.
Q3I changed the phone’s Bluetooth from enabled to disabled, and now I can’t connect anymore.
On your phone, re-enable Bluetooth, and then go to the Home Screen and tap the “CASIO WATCHES” icon. Next, on the watch, hold down (C) for at least three seconds.
Q4I can’t connect after turning off the phone.
Turn your phone off and then back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (C) for at least three seconds.
Phone-Watch Connection
Q1I can’t establish a connection between the phone and watch.
Have you tried turning your phone off and then back on again?
Turn your phone off and then back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (C) for at least three seconds.
Has the watch been re-paired with the phone?
After deleting the pairing information from CASIO WATCHES and your phone, re-pair the watch and phone.
Pair the watch with a phone.If you are unable to establish a connection...
After deleting pairing information from the watch, re-pair it with your phone.
Changing to a Different Phone Model
Q1Connecting the current watch to another phone.
Delete the pairing information from your watch and then pair it with the phone you want to connect with.
Auto Time Adjustment by Bluetooth Connection (Time Adjustment)
Q1When does the watch adjust its time?
The watch will connect with the phone and perform auto time adjustment at around 12:30 a.m., 6:30 a.m., 12:30 p.m. and 6:30 p.m. The connection is automatically terminated after auto time adjustment is complete.
Q2Auto time adjustment is not performed at a scheduled time.
Is auto time adjustment not being performed according to its normal schedule?
Note that auto time adjustment is not performed for 24 hours after swapping of the Home Time and World Time, or after the time setting is adjusted manually on the watch. Auto time adjustment will resume 24 hours after either of the above operations is performed.
Is auto time adjustment enabled?
Auto time adjustment will not be performed at the scheduled times unless it is enabled. Enable auto time adjustment.
Q3Time is not displayed correctly.
If your phone is unable to receive a signal because you are outside its service range or for some other reason, the watch may not be able to display the correct time. If this happens, connect the phone to its network and then adjust the time setting.
Q4Hands are out of alignment.
Strong magnetism or impact can cause the hands to go out of alignment. Adjust hand alignment.
Check the information below to find out how to align the hands manually.
Alarm and Hourly Time Signal
Q1An alarm does not sound.
Is the watch’s battery charged?
Keep the watch exposed to light until it recharges sufficiently.
Other than the above.
The alarm’s settings may not be configured. Configure the alarm settings.
Q2The hourly time signal does not sound.
Is the watch’s battery charged?
Keep the watch exposed to light until it recharges sufficiently.
Other than the above.
The hourly time signal may be disabled. Enable the hourly time signal.
Hand Movement and Indications
Q1I don’t know what mode the watch is in.
Hold down (C) for at least one second to return to the Timekeeping Mode. Use (C) to navigate between modes.
Q2All hands are stopped and buttons do not work.
The battery is dead. Keep the watch exposed to light until it recharges sufficiently.
Q3The hands suddenly start moving at high speed.
This is due to the reason (or one of the reasons) below, and does not indicate malfunction. Simply wait until normal hand movement resumes.
The watch is recovering from a power saving state.
Watch is connected with a phone to adjust its time setting.
Q4Hands are stopped and buttons do not work.
The watch is in the charge recovery mode. Wait until the recovery process is complete (for about 15 minutes). The watch will recover more quickly if you place it in a brightly lit location.
Q5Why is the current time indicated by the watch is off by a certain amount of time (nine hours, three hours and 15 minutes, etc.)?
The city setting is not correct. Select the correct setting.
Q6The current time indicated by the watch is off by one hour or 30 minutes.
The summer time setting is not correct. Select the correct setting.
Q7The time indicated by the hands is different from the digital time.
Strong magnetism or impact can cause the hands to go out of alignment. Adjust hand alignment.
Check the information below to find out how to align the hands manually.
Other
Q1I can’t find the information I need here.
Visit the website below.