How Fast Is Wi-Fi 7 on iPhone? Measure It With iPerf3
Wi-Fi 7 iPhones cap at 160 MHz channels and two streams, so 1.4 to 1.9 Gbps is the honest ceiling. Here is how to measure yours without a gigabit bottleneck.
You bought a Wi-Fi 7 router with “19 Gbps” on the box, your iPhone supports Wi-Fi 7, and downloads feel the same as last year. Before blaming the router, the phone, or the ISP, measure what the link between the phone and the wall delivers. That number is knowable in ten minutes, and it is both higher than your internet speed test shows and much lower than the box promises.
The short answer
Every Wi-Fi 7 iPhone (the iPhone 16 line except the 16e, and the whole iPhone 17 line including the Air) caps at 160 MHz channels and two spatial streams: no 320 MHz. That means a link rate near 2.9 Gbps and real TCP throughput of 1.4 to 1.9 Gbps close to the access point. To see that number you need an iperf3 server on 2.5GbE or faster wiring; over gigabit Ethernet you measure the cable (940 Mbps), not the Wi-Fi.
Which iPhones have Wi-Fi 7
| iPhone | Wi-Fi | 6 GHz band |
|---|---|---|
| 15 / 15 Plus | Wi-Fi 6 | No |
| 15 Pro / 15 Pro Max | Wi-Fi 6E | Yes |
| 16 / 16 Plus / 16 Pro / 16 Pro Max | Wi-Fi 7 | Yes |
| 16e | Wi-Fi 6 | No |
| 17 / 17 Pro / 17 Pro Max / Air | Wi-Fi 7 (Apple N1) | Yes |
The fine print applies to both Wi-Fi 7 generations: the Broadcom radio in the 16 line and Apple’s own N1 chip in the 17 line each stop at 160 MHz channel width. The 320 MHz channels that headline the Wi-Fi 7 spec are for other clients. All of these phones run 2x2 MIMO, two spatial streams.
What 160 MHz and two streams mean in Mbps
Three numbers, from theory to your screen:
- Link rate: about 2.9 Gbps. Two streams over a 160 MHz channel with 4096-QAM. Your router’s client list shows the negotiated number, around 2,882 Mbps in ideal conditions.
- Real TCP throughput: 1.4 to 1.9 Gbps. Wi-Fi overhead (airtime scheduling, acknowledgements, protocol framing) consumes a third to a half of the link rate. Published iperf3 measurements on the 16 Pro and 17 Pro land in this bracket within a few meters of the access point.
- For comparison, an iPhone 15 Pro on Wi-Fi 6E negotiates about 2.4 Gbps on the same 160 MHz channel and measures around 1.2 to 1.5 Gbps. The Wi-Fi 7 gain on iPhone is the 4096-QAM bump plus better multi-link behavior, roughly 20 to 30 percent, not a doubling.
The gigabit trap
Most measurements go wrong on the wired side: the cabled half of the test has to be faster than the Wi-Fi you’re measuring.
Gigabit Ethernet delivers about 940 Mbps of TCP payload. Any Wi-Fi 7 iPhone near the access point beats that. If your iperf3 server sits behind a gigabit switch port, every test will read 900-something and the Wi-Fi upgrade will look like a scam. The wire is the bottleneck, and the test can’t see past it.
Ways out:
- A Mac with a 2.5GbE or 10GbE port (Mac mini and Mac Studio offer 10GbE as a build option) plugged into a multi-gig port on the router.
- A USB-C 2.5GbE adapter on any Mac. They cost about as much as a pizza and remove the ceiling.
- A NAS with a 2.5/10GbE port, if it can run an iperf3 server.
Your internet plan has the same problem in the other direction: a 1 Gbps WAN can’t exercise a 1.9 Gbps wireless link, which is why internet speed tests kept showing the same number after the router upgrade. Only a LAN test shows what the new radio does.
Run the measurement
- Server on multi-gig wiring. Mac in Server mode, connected at 2.5 Gbps or better. Note the IP.
- Router check. 6 GHz radio enabled, channel width at 160 MHz, and the phone joining the 6 GHz band. A dedicated 6 GHz SSID makes the last part deterministic.
- Stand one meter from the access point. This first run is the ceiling measurement; interference and walls come later.
- Client mode on the phone: TCP, download, 30 seconds. Download (server to phone) matches how you consume data.
- Parallel streams: 4 to 8. A single TCP stream rarely fills a multi-gigabit pipe; parallel streams share the work. The app exposes this as one control in Pro mode.
- Repeat from your actual seat. Desk, sofa, kitchen. Save each run with the location as the name. The difference between the ceiling run and the seat run is what geometry costs you, and it decides whether the next dollar goes to a better AP position or a wired drop.
Reading the result
- 1.4 to 1.9 Gbps at one meter: the link performs to spec. Enjoy it.
- Exactly 900 to 940 Mbps: you are measuring a gigabit wire somewhere on the path. Fix the server side and re-run.
- 600 to 1,200 Mbps through one wall: normal. 6 GHz attenuates faster than 5 GHz; that is the price of the clean band. If the drop is steeper than expected, the mesh and placement questions come next.
- 500 to 700 Mbps right next to the AP: something downgraded the link. Usual suspects: the router fell back to 80 MHz width (check the client list), a DFS event moved the channel, band steering parked the phone on 5 GHz, or a neighbor’s network shares the channel.
- MLO (multi-link operation, the other headline Wi-Fi 7 feature) improves latency stability by spreading traffic across bands. It shows up in steadier charts and calmer jitter numbers, not in a higher peak.
Bottom line
On iPhone, Wi-Fi 7 is a real but bounded upgrade: 160 MHz, two streams, about 1.5 Gbps where you sit, up to 1.9 in the same room as the access point. Whether your setup delivers that is a ten-minute measurement: wired multi-gig server, TCP download, parallel streams, one run at the AP and one at your seat. Measure before rearranging hardware; the number tells you which change would matter.