Manual for C45

Manual for C45

Brand: SIEMENS

Category: Mobile Phone

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 7:45 p.m.

Warranty Information

Improper use invalidates the warranty!

Getting Started

  • Charge battery: Plug in the charger, charge for at least two hours.
  • Switch on/off: Hold down the On/Off/End key.
  • Enter PIN: Enter a 4-8 digit PIN when prompted. Confirm with OK.

Making a phone call

  • Dialling: Enter number using digit keys. Press Call key to dial.
  • End call: Press End key briefly.
  • Accept call: Press Reply.
  • Reject call: Press Reject.

Phonebook

  • New entry: Open Phonebook, select , enter number and name, then Save.
  • Call/search: Open Phonebook, enter first letter of name or scroll to select. Press View or dial number.
  • Group: Assign entries to groups for easier management.

Troubleshooting and error codes

ProblemPossible causesPossible corrective measures
Phone cannot be switched on.On/Off key not pressed long enough.Press On/Off key for at least two seconds.
Standby time too short.Flat battery.
Battery contacts dirty.		Charge battery. Check charging indicator in the display.
Clean contacts.
Charging fault (charge icon not displayed).Battery totally discharged.1) Plug in charger cable 2) Wait for approx. 5-10 minutes until the charge icon is displayed 3) Charge for 5 hours.
No connection to network.Signal weak.
Outside GSM range.
SIM card not valid.
New network not authorised.
Network barring is set.
Network overloaded.		Move higher, to a window or open space.
Check service provider coverage map.
Reclaim at the service provider.
Try manual selection or select a different network (p. 63).
Check barrings (p. 63).
Try again later.
Phone loses network.Signal too weak.Reconnection to another service provider is automatic (p. 63). Switching the phone on and off may speed this up.
Calls not possible.2nd line set.
New SIM card inserted.
Charge limit reached.
Credit used up.		Set line 1 (p. 63).
Check for new restrictions.
Reset limit with PIN 2 (p. 62).
Load credit.
Certain uses of the phone not possible.Call restrictions are set.Barrings may have been set by your service provider. Check barrings (p. 63).
Entries cannot be made in Phonebook.Phonebook is full.Delete entries in Phonebook (p. 20).
Voice mail does not workCall divert to the mailbox not set.Set call divert to the mailbox (p. 35).
SMS (text message) flashes.SMS memory full.Delete messages (SMS) to make room (p. 24).
Function cannot be set.Not supported by your service provider or registration required.Contact your Service Provider.
Charge counter does not work.Charge pulse not transmitted.Contact your Service Provider.
Message cannot be sent.Service provider does not support this service.
Phone number of the service centre is not set or is wrong.
SIM card contract does not support this service.
Service centre overloaded.
Addressee does not have a compatible phone.		Check with your Service Provider.
Set service centre (p. 29).
Contact your Service Provider.
Repeat message.
Check.
PIN error.Three wrong entries.Enter the MASTER PIN (PUK) provided with the SIM according to the instructions. If MASTER PIN or PIN are lost, contact your service provider.
Phone code error.Three wrong entries.Contact Siemens Service (p. 72).
Service provider code error.No authorisation for this service.Contact your Service Provider.
Too few/too many menu entries.Functions may have been added or removed by the service provider via the SIM card.Check with your Service Provider.
No fax possible.Incorrect settings in the PC.
No authorisation for the service.		Check settings (p. 67).
Contact your Service Provider.
DamageSevere shock.
Phone became wet.		Remove battery and SIM and insert them again. Do not dismantle the phone.
Remove battery and SIM card. Dry immediately with cloth, do not heat. Dry connector contacts thoroughly. Stand unit upright in an air current. Do not dismantle the phone.
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