| Phone book capacity | 255 |
| Extra functions | SIM reader function |
| Extra functions | SMS function function |
| Backlight illumination | No |
| Cordless phone standard | DECT |
| Polyphonic ringtones | Yes |
| ISDN Port | No |
| Number of Name Keys | 50 |
| Ethernet connection | No |
| H.323 VoIP-Protocol | No |
| IP Phone | No |
| MMS functionality | No |
| Caller display | Yes |
BT 4100 Single reviews
- 255
- SIM reader function
