TP-Link C5 User Manual page 53

press the power button to turn off the screen and turn it back on. In most cases this fault can be solved
with this step;
b)
recover the screen-touch function;
c)
system is back to normal or close corresponding applications;
d)
official website and update the phone.
6. Q：What should I do if the phone cannot identify a SIM card?
A：Please check the possible reason and troubleshooting steps below to solve your issue:
a)
please turn off Airplane mode, and re-install the SIM card to restore connection between the SIM card
and phone;
b)
slot via Dual-SIM settings to activate the SIM card;
c)
with a SIM card with supported system or replace with a normal SIM card;
d)
the phone serial number (IMEI number).
e)
f)
service center;
g)
download the corresponding firmware from official website and update the phone with it.
7. Q: What should I do if the system crashes?
A:
a)
IM/TF card, or faulty phone firmware (Linux kernel); please remove SIM card and TF card,
b)
c)
applications running in the phone and the phone is overloaded for too long, which results in slow
response. Or it is due to the bugs in running applications, or ROOT permission of the phone is broken,
which results in system instability or system crash can also be caused by faulty firmware; please avoid
running too many applications at the same time and avoid phone overload for too long. Uninstall or
update the applications that have bugs, format the phone, and reset the phone with official firmware.
8. Q: What should I do if the phone cannot connect to Wi-Fi?
A: Please check the possible reason and troubleshooting steps below to solve your issue:
a)
good enough when trying to connect;
b)
change the connection restriction of the router;
The phone screen is humid or wet, please wipe away the water on the phone screen to
There are some running applications that slow down the system, please wait until the
The phone firmware or the screen itself is faulty, please download the firmware from the
The phone is in Airplane mode or there is poor contact between the SIM card and phone,
One of the SIM card slots in dual-SIM phone is disabled, please enable the disabled SIM card
The SIM card system is not supported by the phone or the SIM card is faulty, please replace
The phone serial number (IMEI number) is lost, on dial screen, please enter '*#06#' to view
If the serial number is lost, bring the phone to a local service center;
SIM card deck or tray is deformed, which results in bad contact, please bring the phone to a
Phone firmware is faulty, please bring the phone to a service center to fix the software, or
If the phone has crashed during power-on, this is most likely due to low battery, faulty S
Then charge the phone and retry. If the fault still exists, update the phone firmware;
If the phone has crashed when in use, it is most likely due to the fact that there are many
Wi-Fi signal is too weak to establish the connection, please make sure the Wi-Fi signal is
Connection restrictions have been set on wireless router (such as MAC/IP filtering), please
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