Siemens Série S et C : guide complet — S35, S45, S55, S65, S75, C35, C45, C55, C65, C75 2026
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Siemens Mobile was for years the world's third largest mobile phone manufacturer. The S and C Series represent the heart of the Siemens range: S = premium business line, C = affordable consumer line. Both shared the same base hardware architecture. From the legendary S35 of 1999 — first Siemens with graphic display — to the S75 and C75 of 2005-2006, this is the most complete guide to the Siemens S and C series.
Siemens Range Structure
- S = top of range, business, larger display, more features
- C = consumer mid-range, more affordable, smaller display
- M = sports/rugged (M35, M55, M65)
- ME = military/extreme (ME45 — the most rugged)
- SL = slim/design (SL45, SL55, SL65)
- A = entry-level (A50, A55, A70)
Generation Timeline
| Generation | Year | Platform | Key feature |
|---|---|---|---|
| x35 | 1999-2001 | 2nd gen | S35, C35, M35 — graphic monochrome display |
| x45 | 2001-2003 | 3rd gen | S45, C45 — first GPRS, S45i with email |
| x55 | 2002-2004 | 4th gen | S55, C55 — first colour on C, Bluetooth on S |
| x65 | 2004-2005 | 5th gen | S65, C65 — integrated camera |
| x75 | 2005-2006 | 6th gen | S75, C75 — last Siemens before BenQ |
Universal Siemens S and C Secret Codes
| Code | Function |
|---|---|
*#06# |
IMEI |
*#0606# |
SP lock status — remove SIM first |
*#0003*(8-digit code)# |
SP lock unlock |
*#0000# + green |
Language automatic |
*#0001# + green |
English |
*#0034# + green |
Spanish |
*#0039# + green |
Italian |
*#0049# + green |
German |
*#0033# + green |
French |
Software version: Menu → 8 → 8 → 2 → press left softkey
SP Unlock procedure:
- Remove SIM → type
*#0606#→ note the raw code shown - Insert non-accepted SIM → power on
- Type
*#0003*(8-digit NCK)# - Phone unlocked
Easter egg White House: add *12022243121 to phonebook → restart. On some x35 models a developer bonus screen appears.
Siemens S35 (1999) — first graphic display
First Siemens with graphic monochrome display. Internal antenna, lateral side keys, IrDA port.
| Spec | Detail |
|---|---|
| Display | Monochrome graphic — larger than C35 |
| Antenna | Internal |
| Side keys | Yes |
| IrDA | Yes |
| Default code | 0000 |
S35 vs C35 key differences: S35 has internal antenna + side keys + larger display. C35 has external (visible) antenna + no side keys + smaller display.
Rare technical fact: the C35 PCB is virtually identical to the S35's. The C35 firmware even supports the S35's side buttons — they simply weren't mounted on the C35 for cost reasons.
M35: rugged variant — IP-resistant, Hurricane Yellow/Half Pipe Blue/Summit Grey colours, screwless design.
Siemens C35 (2000, codename Marabu)
Consumer version of S35. Announced at CeBIT Hannover March 2000. 7 colour variants. 20 ringtones including DJ-composed ones + built-in composer.
C35i: adds WAP 1.1, IrDA port, hardware modem (double flash memory: 2×2 MB vs S35's 1×4 MB).
Siemens S45 (2001) — first Siemens GPRS
First Siemens phone with GPRS. 360 KB internal memory marketed as drag-and-drop manageable like a hard disk via serial cable.
S45i: adds email client.
| Spec | Detail |
|---|---|
| GPRS | Yes — first Siemens GPRS |
| Memory | 360 KB |
Siemens ME45 — the most rugged
IP54 waterproof/dustproof + MIL-STD-810 military certification. Same platform as S45 but extreme-duty housing. Rarest and most sought-after Siemens vintage model in good condition.
Siemens C45 (2002)
Consumer successor to C35. Improved monochrome graphic display, polyphonic ringtones.
Siemens S55 (2002) — first Siemens colour + Bluetooth
First Siemens with colour display (256 colours) AND Bluetooth. Direct competitor to Ericsson T68.
| Spec | Detail |
|---|---|
| Display | 256 colours (8-bit), 101×80 px |
| Bluetooth | Yes — first Siemens Bluetooth |
| IrDA | Yes |
| Networks | GSM 900/1800/1900 tri-band |
| Weight | 85 g |
| Camera | No built-in (optional clip-on 640×480 with flash) |
Siemens C55 (2003)
Consumer colour phone with 4096 colours — paradoxically more than the S55's 256 colours, different display technology.
Siemens S65 (2004) — camera and 65K colours
| Spec | Detail |
|---|---|
| Platform | X65 |
| Display | 132×176 px TFT, 65,000 colours |
| Camera | 1.3 MP |
| Bluetooth | Yes |
| Storage | 10 MB + RS-MMC slot (up to 128/256 MB) |
| Audio | WAV, AAC, MP3, 3GP |
| Weight | 98 g |
SP65: camera-free version for camera-restricted enterprise environments.
Display chip note (X65 platform): LPH88xxxx = Hitachi HD66773 | LS020xxx = Sharp | L2F50 = Epson. Important for repairers.
Siemens C65 (2004)
| Spec | Detail |
|---|---|
| Platform | X60 |
| Display | 130×130 px CSTN, 65,000 colours (square!) |
| Camera | VGA 0.3 MP |
| Weight | 86 g |
Square display: the C65 has a 130×130 square display — different from the S65's 132×176 rectangular. This was specific to the X60 platform used on the C65.
Carrier variants: CT65 (T-Mobile), CV65 (Vodafone), CO65 (O2). North America: C66.
Siemens S75 and C75 (2005-2006) — last Siemens before BenQ
S75: first Siemens with 3G/UMTS, 176×220 TFT 262K colours, 1.3 MP AF camera.
C75: 128×160 TFT 65K colours, 0.3 MP camera — last C-series Siemens.
Complete S and C Series Comparison
| Model | Year | Display | Camera | GPRS | BT | 3G | Notes |
|---|---|---|---|---|---|---|---|
| S35 | 1999 | Mono graphic large | No | No | No | No | Internal antenna, side keys |
| C35 | 2000 | Mono graphic small | No | No | No | No | External antenna |
| M35 | 2000 | Mono graphic | No | No | No | No | Rugged, waterproof |
| S45 | 2001 | Mono graphic | No | Yes | No | No | First Siemens GPRS |
| ME45 | 2002 | Mono graphic | No | Yes | No | No | Military/Extreme |
| S55 | 2002 | 256 colours | No (clip-on) | Yes | Yes | No | First BT + colour |
| C55 | 2003 | 4096 colours | No | Yes | No | No | Consumer colour |
| S65 | 2004 | 65K colours | 1.3 MP | Yes | Yes | No | Top 2004 |
| C65 | 2004 | 65K colours | 0.3 MP | Yes | No | No | Consumer 2004 |
| S75 | 2005 | 262K colours | 1.3 MP AF | Yes | Yes | Yes | First 3G Siemens |
| C75 | 2006 | 65K colours | 0.3 MP | Yes | No | No | Last C-series |
Collector Value 2026
| Model | Good condition | Mint with box |
|---|---|---|
| S35 | 15-35€ | 40-80€ |
| C35 | 10-20€ | 25-50€ |
| M35 | 15-30€ | 35-70€ |
| ME45 | 25-60€ | 60-120€ |
| S45 | 10-25€ | 30-60€ |
| S55 | 15-30€ | 35-70€ |
| S65 | 15-35€ | 40-80€ |
| S75 | 20-45€ | 50-100€ |
Most valuable: ME45 with intact rubber housing (rare), S35 with original box, S75 (only Siemens 3G).