Siemens C81 User Manual page 116

116 Questions & Answers
Problem
Charging error
(charge icon not
displayed).
SIM error.
No network
connection.
Phone loses
network.
Calls not possible. Second line set.
Some calls not
possible.
Impossible to make
entries in contacts.
Voice message not
functioning.
Possible causes
Battery totally discharged.
Temperature out of range:
5 °C to 45 °C
(41°F to 113°F).
Contact problem
No mains voltage.
Wrong charger.
Battery faulty.
SIM card not inserted
correctly.
Dirty SIM card contacts.
SIM card with wrong
voltage.
SIM card damaged
(e.g. broken).
Weak signal.
Outside the GSM range.
Invalid SIM card.
New network not authorised. Try manual selection or select a different network
Network call barring is set.
Network overloaded.
Signal too weak.
New SIM card inserted.
Charge limit reached.
Credit used up.
Call restrictions are in place. Barrings can be set by service provider. Check barrings
Contacts list is full.
Call divert to mailbox not set. Set call divert to mailbox (page 64).
Possible solution
1) Plug in charger cable, battery is on charge.
2) Charge icon appears after approx. 2 hours.
3) Charge battery.
Make sure the ambient temperature is right, wait for a
while, then recharge.
Check power supply and connection to the phone.
Check battery contacts and telephone connection sock-
et, clean them if necessary, then insert battery again.
Use different mains power socket, check mains voltage.
Only use original accessories.
Replace battery.
Check that the SIM card is inserted correctly (page 17).
Clean SIM card with a dry cloth.
Use 1.8-V and 3-V SIM cards only.
Carry out a visual check. Have service provider change
the SIM card.
Move higher, to a window or an open space.
Check service provider's coverage area.
Complain to the service provider.
(page 86).
Check network barrings (page 86).
Try again later.
Reconnection to another service provider is automatic.
Switching phone off and on again can speed this up.
ã
Set line 1 (page 86).
Check for new barrings.
Reset limit with PIN2 (page 43).
Load credit.
(page 85).
Delete entries (see Standard functions, page 24).