Product Info

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My phone can't receive incoming calls
•Make sure that your phone is switched on and connected to a network.
Check for overloaded or unavailable network.
•Check your subscription status with your carrier.
•Make sure that you have not forwarded incoming calls.
•Make sure that you have not barred certain calls.
•Make sure that your phone is not in airplane mode.
The caller’s name/number doesn't appear when a call is received
•Check that you have subscribed Caller ID service with your carrier.
•Your caller may have concealed his name or number.
I can't find my contacts
•Make sure that your SIM card is not broken.
•Make sure that your SIM card is inserted properly.
•Import all contacts stored in SIM card to phone.
The sound quality of the calls is poor
•Adjust the volume during a call by pressing the Volume up/down key.
•Check the network strength. Move to a location with stronger signal
strength.
• Make sure that the receiver, connector or speaker on your phone is clean.
I can't use the features described in the manual
•Check with your carrier to make sure that your subscription includes
this service.
•Make sure that this feature doesn't require any additional accessory.
When I select a number from my contacts, the number can't be dialed
•Make sure that you have correctly recorded the number in your file.
•Make sure that you have selected the country code when calling an
international number.
I can't add a contact
•Make sure that your SIM card contact list is not full; delete some files
or save the files to the phone.
My callers can't leave messages on my voicemail
•Contact your network carrier to check service availability.
•Set up your voicemail with your carrier, so that your caller can leave
a message.
I can't access my voicemail
•Make sure that your carrier’s voicemail number is correctly entered in
"Voicemail number".
•Try later if the network is busy.
I can't send and receive MMS
•Check your phone memory as it might be full.
•Contact your network carrier to check service availability and MMS
parameters.
•Verify the server center number or your MMS profile with your carrier.
•The server center may be swamped. Try again later.
•Start a new Messaging string. You messaging string may have reached
its limit.
SIM card PIN locked
•Contact your network carrier to obtain the PUK (Personal Unblocking
Key) code.
I can't connect my phone to my computer
•Check to make sure the USB port is not broken. If it’s not working, try
another USB port on your computer.
•Make sure USB drivers are properly installed.
•If you are using a Windows computer, make sure it supports MTP mode.
If you are using a Mac, make sure to install Android File Transfer from
www.android.com/filetransfer/.
•Make sure that you’re using the correct cable from the box.
I can't download new files
•Make sure that there is sufficient phone storage space for your
download.
•Select the microSD card as the location to store downloaded files.
•Check your subscription status with your carrier.
The phone can't be detected by others via Bluetooth
•Make sure that Bluetooth is turned on and your phone is visible to
other users.
• Make sure that the two phones are within Bluetooth’s detection range.
The battery drains too fast
•Make sure that you follow the complete charge time (minimum 180
minutes).
•After a partial charge, the battery level indicator may not be exact.
Wait for at least 20 minutes after removing the charger to obtain an
exact indication.
•Adjust the brightness of screen as appropriate.
•Extend the email auto-check interval for as long as possible.
•Update news and weather information on manual demand, or increase
their auto-check interval.
•Exit background-running applications if they are not being used for
extended periods of time.
•Deactivate Bluetooth, Wi-Fi, or GPS when not in use.
The phone becomes warm following prolonged calls, game playing,
internet surfing or running other complex applications
•This heating is a normal consequence of the CPU handling excessive
data. Ending the above actions will make your phone return to normal
temperature.
After Factory data reset is performed, I can't use my phone without
entering Google account credentials
•After reset is performed, you must enter the original Google account
credentials that were used on this phone.
•If you don’t remember your Google account credentials, complete
Google account recovery procedures.
•If you still cannot access your phone, apply to the authorized repair
center, but remember that it will not be regarded as warranty case.
The phone doesn't ring when a call or message arrives
•Make sure that Do Not Disturb mode (go to Settings > Sound > Do
not disturb) is not activated.
•Press the Volume up/down key to adjust volume.
I forget some passwords/codes/keys on phone
•Perform Factory data reset.
•If you still cannot access your phone, apply to the authorized repair
center, but remember that it will not be regarded as warranty case.
U5 3G 4047A_Safety Leaflet_US_V2_20170719.indd 12-13 2017/7/19 17:47:40