Brand: SIEMENS
Category: Mobile Phone
Document Type: Manual
Language: EN
Manual for A50
Uploaded: Nov. 21, 2025, 7:06 p.m.
Warranty Information
Siemens AG 2002. All rights reserved. Subject to availability. Rights of modification reserved.
Safety Precautions: Always switch off the phone in hospitals, near medical devices, and in aircraft. Keep a safe distance from pacemakers. Use hands-free kits while driving. Switch off near petrol stations and fuel depots. Be mindful of potential interference with technical installations. To avoid hearing damage, accept calls before holding the phone to your ear. Keep SIM cards away from children. Do not exceed the specified mains voltage.
Getting Started: Covers can be changed easily. Remove protective film from the display. Insert SIM card and battery correctly. Charge the battery fully before first use. Charge for at least two hours. Functions without a SIM card are accessible via the Menu key.
General Instructions: Symbols are used for keys and functions. Menus provide access to functions, network services, and settings. The main menu is accessed from standby mode. Use soft keys to navigate and select functions. The font size is set to Big letters. SOS is the emergency number.
Getting Started: Covers can be changed easily. Remove protective film from the display. Insert SIM card and battery correctly. Charge the battery fully before first use. Charge for at least two hours. Functions without a SIM card are accessible via the Menu key.
General Instructions: Symbols are used for keys and functions. Menus provide access to functions, network services, and settings. The main menu is accessed from standby mode. Use soft keys to navigate and select functions. The font size is set to Big letters. SOS is the emergency number.
Troubleshooting and error codes
| Question | Possible causes | Possible solution |
|---|---|---|
| Phone cannot be switched on. | On/Off key not pressed long enough. | Press On/Off key for at least two seconds. |
| Flat battery. | Charge battery. Check charging indicator in the display. | |
| Battery contacts dirty. | Clean contacts. | |
| Standby time too short. | Speed search active. | Deactivate speed search (p. 58). |
| Display illumination on. | Switch off display illumination (p. 57). | |
| Charging error (charge icon not displayed). | Battery totally discharged. | 1) Plug in charger cable. 2) Wait up to 2 hours until the charge icon is displayed. 3) Charge battery as usual. |
| Temperature out of range: 5 °C to 40 °C | Make sure the ambient temperature is right, wait a while, then recharge. | |
| Contact problem. | Check power supply and connection to the phone. Check battery contacts and device interface, clean them if necessary, then insert battery again. | |
| No mains voltage. | Plug in to a different socket or check voltage. | |
| Wrong charger. | Only use original Siemens accessories. | |
| Battery fault. | Replace battery. | |
| SIM error. | SIM card not correctly inserted. | Make sure that the SIM card is correctly inserted (p. 6). |
| SIM card contacts dirty. | Clean the SIM card with a dry cloth. | |
| SIM card with wrong voltage. | Use 3 V SIM cards only. | |
| SIM card damaged (e.g. broken). | Inspect the damage. Return the SIM card to service provider. | |
| No connection to network. | Signal weak. | Move higher, to a window or open space. |
| Outside GSM range. | Check service provider coverage map. | |
| SIM card not valid. | Reclaim at the service provider. | |
| New network not authorised. | Try manual selection or select a different network (p. 59). | |
| Network barring is set. | Check barrings (p. 59). | |
| Network overloaded. | Try again later. | |
| Phone loses network. | Signal too weak. | Reconnection to another service provider is automatic (p. 59). Switching the phone on and off may speed this up. |
| Calls not possible. | 2nd line set. | Set line 1 1 > (p. 59). |
| New SIM card inserted. | Check for new restrictions. | |
| Charge limit reached. | Reset limit with PIN 2 (p. 58). | |
| Credit used up. | 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. 59). |
| Entries cannot be made in Phonebook. | Phonebook is full. | Delete entries in Phonebook (p. 20). |
| Voice mail does not work. | Call divert to the mailbox not set. | Set call divert to the mailbox (p. 43). |
| SMS (text message) flashes. | SMS memory full. | Delete messages (SMS) to make room (p. 28). |
| 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. | Check with your Service Provider. |
| Phone number of the service centre is not set or is wrong. | Set service centre (p. 34). | |
| SIM card contract does not support this service. | Contact your Service Provider. | |
| Service centre overloaded. | Repeat message. | |
| Addressee does not have a compatible phone. | Check. | |
| PIN error/ PIN 2 error. | Three wrong entries. | Enter the PUK (MASTER PIN) provided with the SIM card according to the instructions. If the PUK (MASTER PIN) has been lost, contact your service provider. |
| Phone code error. | Three wrong entries. | Contact Siemens Service (p. 67). |
| 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. |
| Damage | Severe shock. | Remove battery and SIM and insert them again. Do not dismantle the phone. |
| Phone became wet. | 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. |