How to get an accurate speed test on iPhone
- Close apps that stream, sync or download in the background, and pause iCloud Photos uploads if they are running.
- On Wi-Fi, stand in the room where you normally use your phone. On cellular, test where you normally use it.
- Turn off any VPN while testing, since it can lower measured speed. Switch off Wi-Fi (to test cellular) or cellular (to test Wi-Fi), so you know which one you are measuring.
- Run the test two or three times and compare. Speeds vary by time of day.
What is a good internet speed?
Use this as a rough guide for what common activities need. The numbers are for one person or device at a time, so add them up for a busy household.
| Activity | Roughly needs | Matters most |
|---|---|---|
| Browsing, email, messaging | 1–5 Mbps | Download |
| HD video streaming | About 5 Mbps per stream | Download |
| 4K video streaming | About 15–25 Mbps per stream | Download |
| FaceTime and video calls | 2–5 Mbps each way | Upload and ping |
| Online gaming | 3–10 Mbps | Ping (lower is better) |
| Backing up photos and videos | Faster upload means faster backups | Upload |
Streaming services publish their own recommendations, which change over time. Treat these figures as a starting point.
What the numbers mean
- Download speed is how fast data reaches your iPhone: streaming, browsing and app downloads.
- Upload speed is how fast your iPhone sends data: video calls and photo backup.
- Ping (latency) is the round-trip delay in milliseconds. Under about 50 ms feels responsive. Over 100 ms you notice lag in games and calls.
Mbps is not MB/s
Speeds are measured in megabits per second (Mbps). File sizes use megabytes (MB). There are 8 bits in a byte, so divide Mbps by 8 to estimate MB per second. A 200 Mbps connection downloads at about 25 MB per second.
Why is my iPhone slower than the plan I pay for?
- Wi-Fi distance and walls. Speed drops quickly the farther you are from the router. 5 GHz Wi-Fi is faster than 2.4 GHz but covers less distance.
- Many devices at once. TVs, laptops and cameras share the same connection.
- An older router. It may not support the Wi-Fi standard your iPhone can use.
- Low Data Mode. Check Settings > Wi-Fi > (i) and Settings > Cellular > Cellular Data Options for Low Data Mode, which can limit background activity.
- VPN or Private Relay. Routing through another server adds delay. See how these work.
- Cellular signal and congestion. Speeds on 5G and LTE vary a lot with signal strength, location and how busy the tower is.
- Plan speeds are "up to". What you pay for is the maximum, not a guarantee.
Slow connection? Quick fixes
- Toggle Airplane Mode on for ten seconds, then off.
- Restart your router and your iPhone.
- Move closer to the router, or switch between 2.4 GHz and 5 GHz Wi-Fi if your router offers both.
- If Wi-Fi connects but nothing loads, see how to fix an iPhone Wi-Fi connection with no IP address.
- If problems persist, go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This forgets saved Wi-Fi passwords.
Curious which network you are on? See your iPhone's IP address and ISP. Need to change router settings? Find your router's IP address.