SFR Speed Test — Check Your SFR Box Connection
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Why Test Your SFR Internet Speed?
SFR is France's second-largest telecom operator, offering broadband via SFR Box on fiber (FTTH), ADSL, VDSL2 and 5G fixed networks. Whether you're on the SFR Box 8, Box Power or an older model, your real-world speeds depend on your line type, home network setup and local network congestion — not just the plan advertised in your contract.
A test de vitesse SFR with SpeedTrest gives you independent, accurate measurements to verify what SFR is actually delivering. SFR fiber subscribers should see 500 Mbps to 1 Gbps download; ADSL users typically see 5–20 Mbps depending on distance from the local exchange.
- Verify SFR is delivering contracted speeds to your SFR Box
- Diagnose whether performance issues are SFR-side or in your home network
- Gather evidence before calling SFR support (3023)
- Identify if switching to SFR fiber would significantly improve your experience
SFR Speed Plans — Expected Performance
| SFR Plan | Technology | Typical Download | Typical Upload |
|---|---|---|---|
| SFR Fibre 8 Gbps | FTTH | 4–8 Gbps | 800 Mbps+ |
| SFR Fibre 2 Gbps | FTTH | 1.5–2 Gbps | 500 Mbps+ |
| SFR Fibre 1 Gbps | FTTH | 700–940 Mbps | 400–500 Mbps |
| SFR VDSL2 | VDSL2 | 20–100 Mbps | 5–15 Mbps |
| SFR ADSL | ADSL2+ | 1–20 Mbps | 0.5–2 Mbps |
⚡ Test Your SFR Speed Now
SpeedTrest uses Cloudflare's global edge network to give you accurate, unbiased SFR speed results.
Run Speed Test →Why Your SFR Speed May Be Lower Than Expected
WiFi limitations: SFR Box routers broadcast WiFi 5 or WiFi 6 depending on the model, but walls, interference and distance reduce wireless speeds significantly. Always test via Ethernet for an accurate baseline.
SFR Box firmware: SFR pushes firmware updates automatically, but occasionally a manual reboot is needed to apply them. Access your SFR Box admin panel at 192.168.0.1 to check your firmware version.
Peak hours: Like all French operators, SFR's network sees higher congestion between 7 PM and 11 PM. ADSL and VDSL2 users are more affected than fiber subscribers.
Line quality: On copper (ADSL/VDSL2) lines, distance from the telephone exchange is the primary speed limiter. SFR can run a remote line diagnostic — request it when calling 3023.
Number of connected devices: The more devices streaming, gaming or downloading simultaneously on your SFR Box, the less bandwidth each one gets. Disconnect unused devices before running a speed test.
How to Optimize Your SFR Speed
1. Test wired first
Connect your computer directly to the SFR Box with an Ethernet cable. This removes WiFi as a variable and shows your true SFR line speed.
2. Reboot your SFR Box
Hold the reset button for 3 seconds (not 10 — that would factory reset the device) or simply unplug for 30 seconds. This often resolves speed drops without requiring a support call.
3. Use the 5 GHz band
Connect to the 5 GHz WiFi network on your SFR Box for faster, less congested wireless speeds. Look for the network with "-5G" in its name.
4. Check SFR network status
Visit sfr.fr/assistance or the SFR & Moi app to check for outages in your area before spending time troubleshooting your home network.
5. Request a fiber upgrade
If you're on ADSL and fiber is available at your address, SFR often offers promotional migration deals. A fiber (FTTH) connection eliminates copper line limitations entirely.
Frequently Asked Questions
What SFR fiber speed should I see on a wired connection?
On SFR's 1 Gbps fiber plan with an Ethernet cable, expect 700–940 Mbps download and 400–500 Mbps upload. WiFi speeds will be lower — typically 200–600 Mbps depending on your SFR Box model and WiFi standard.
How do I contact SFR if my speed is consistently low?
Call SFR customer service at 1023 (free) or 3023 (from a mobile), use the SFR & Moi app, or visit an SFR store. Run SpeedTrest beforehand and note your results to provide to support.
Is SpeedTrest free for SFR users?
Yes, completely free. No sign-up, no data stored, no ads. Just open speedtrest.com and click Start.