22 Cat B25 Phone User Manual
Frequently Asked Questions
Prior to contacting the after-sales service providers, please make the following simple
inspection to save the maintenance time and expenses for you as much as possible.
Common Troubles Causes and Resolutions
Cannot power on Check if the pressing on the Startup Key
for at least more than 1 second;
Check if the battery contact, please take
out the battery and then re-insert and try
to restart;
Check if the battery has charge, if not,
please charge
Cannot connect to network Signal strength is too weak, try another
location with better coverage;
The cell phone is out of the network
coverage of network service provider;
SIM card is invalid, please contact your
network supplier;
It display message upon startup Check if SIM card is installed correctly;
If auto lock function is enabled, please
input the phone password before use;
If SIM lock function is enabled for every
startup, you must input PIN code;
Input PUK code: The phone will be
locked if you incorrectly enter PIN code
three times, you have to enter PUK code
provided by your network operator;
Poor quality of calls Please check if the volume is adjusted
properly;
When this phone is used in the areas with
poor signal, e.g. near the high buildings
or in basements, the call quality will be
affected;
When this cell phone is used in calling
intensity period, like the rush hours,
calling failure is caused by network
congestion;
