W611W User Manual
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Picture 151 - reparation required for the USB / U disk upgrade
Enter the upgrade mode step:
1)Keep the device turned off. Disconnect USB and press the red hang button to shut down. Note that if the UBS is
connected to the device, the device starts automatically after shutdown
。
2)Press the volume button and press the usb for about three seconds to release.
3)Success enters the upgrade mode, and the device displays the upgrade logo. At this time, the device will
automatically select the upgrade file in the U disk, and upgrade after finding, the device will automatically restart after
completion.
Note! If you mistakenly trigger the download mode, or enter the download mode to exit, you can long
press the red hang up button to restart.
13.9 Common Trouble Cases
Table 29 - Trouble Cases
Trouble Case
Solution
Device could not boot up
1. First consider the situation that the battery has been exhausted, and
charge the device. Please use the charger configured at the time of
purchase when charging.
2. If you see the phone enter "POST mode", it means that the phone
system is damaged. Please contact technical support to help you
restore the phone system.
Device could not register to a
service provider
1. Please check whether the phone is connected to the network. The phone
needs to be connected to a wireless network, and check whether the
wireless icon is normal. If the icon shows
or , the network is
unavailable, please check the network facilities.