Troubleshooting
This chapter lists some problems you might encounter while using your phone.
Some problems require you to call your service provider, but most are easy to
fix yourself.
Message
Possible causes
There is no SIM card in
SIM error
the phone or it is inserted
incorrectly.
Signal is weak or you're
outside the carrier
No network
network.
connection/
Losing network
Operator applied new
services.
Possible corrective measures
Make sure that the SIM card is correctly
inserted.
Move towards a window or into an open
area. Check the network operator coverage
map.
Check whether the SIM card is more than
6~12 months old. If so, change your SIM
at your network provider's nearest branch.
Contact your service provider.
139