How to Check WiFi Signal Strength on iPhone

Published March 19, 2026 · 6 min read

The WiFi icon in your iPhone's status bar gives you a rough idea of signal strength, but "three bars" doesn't tell you much. Is that good enough for a video call? Will it handle a large file download? Is the signal actually borderline, explaining those random disconnects you've been experiencing?

To properly diagnose WiFi issues, you need actual signal strength numbers. Here's how to get them on your iPhone, what those numbers mean, and what to do if your signal is weaker than it should be.

The Limitations of iOS Settings

Apple doesn't make it easy to check detailed WiFi information. If you go to Settings > WiFi and tap the info button next to your connected network, you'll see your IP address, subnet mask, router address, and DNS settings. What you won't see is your signal strength in decibels, your noise floor, or your current channel — the metrics that actually matter for diagnosing WiFi problems.

The WiFi bars in the status bar are a simplified, three-level indicator. They update slowly and don't distinguish between a connection that's "fine" and one that's "excellent." You can have full bars and still experience poor performance if there's interference on your channel or if you're connected to a congested 2.4 GHz network instead of 5 GHz.

Why Signal Strength Matters

WiFi signal strength is measured in dBm (decibels relative to one milliwatt). It's a negative number — the closer to zero, the stronger the signal. Here's a practical guide to what the numbers mean:

• -30 to -50 dBm — Excellent. You're very close to the router. Maximum speed and reliability
• -50 to -60 dBm — Very good. More than enough for any task including video calls and streaming
• -60 to -70 dBm — Acceptable. Adequate for web browsing and email. Video calls may occasionally stutter
• -70 to -80 dBm — Weak. Expect slower speeds, higher latency, and intermittent drops. Not reliable for video
• Below -80 dBm — Very weak. Connection will be unreliable. You'll experience frequent disconnects

Every -3 dBm change represents roughly halving or doubling of signal power. So the difference between -50 and -70 dBm is massive — that's about a 100x reduction in signal power.

Checking Signal Strength with PingKit

PingKit's My Network tool shows detailed information about your current WiFi connection that iOS Settings doesn't expose. Open PingKit, go to the Tools tab, and tap My Network. You'll see your network name (SSID), signal strength, the frequency band you're connected to, your internal IP, external IP, and more.

For ongoing monitoring, PingKit's Connection Monitor is even more useful. It continuously tracks your connection quality over time, so you can see when and how your signal fluctuates. This is particularly helpful for spotting intermittent issues — the kind where your WiFi is fine most of the time but drops out every few minutes.

What to Do If Your Signal Is Weak

If your readings are regularly below -70 dBm where you use your phone, you have a signal problem. Here's how to fix it, starting with the easiest changes:

Reposition your router

The single most effective improvement is often the simplest. Routers should be in a central, elevated, open location. If yours is tucked in a cupboard, sitting on the floor behind furniture, or jammed in a corner of the house, moving it can dramatically improve coverage. WiFi signals radiate outward in all directions — a corner placement wastes half of the router's range.

Switch to 5 GHz

If your router broadcasts both 2.4 GHz and 5 GHz (most modern routers do), make sure you're connected to 5 GHz when you're within range. The 5 GHz band offers much higher throughput and less interference from neighbouring networks. The trade-off is shorter range, but within 10-15 metres with line of sight, it's always the better choice.

Reduce interference

Common sources of WiFi interference include microwave ovens (they operate at 2.4 GHz), Bluetooth devices, baby monitors, cordless phones, and neighbouring WiFi networks. If you live in a flat or dense neighbourhood, channel congestion on 2.4 GHz can be severe. Check your router settings and try a different channel — channels 1, 6, and 11 are the only non-overlapping options on 2.4 GHz.

Add a mesh network or extender

If repositioning doesn't help because your home is simply too large or has thick walls (brick, concrete, or stone are particularly bad for WiFi), a single router won't be enough. Mesh WiFi systems place multiple nodes around your home and create a single seamless network. They're a significant upgrade over cheap range extenders, which typically halve your bandwidth.

Monitoring Signal Strength Over Time

One-off measurements only tell part of the story. WiFi quality can change throughout the day as neighbours come home and fire up their routers, as interference sources switch on and off, and as your ISP's backhaul gets congested during peak hours.

PingKit's Connection Monitor runs in the background and logs your connection quality over time. By reviewing the history, you can spot patterns — maybe your WiFi degrades every evening, or maybe it drops out briefly every hour (which could indicate a router firmware issue causing periodic reconnections).

Understanding your WiFi signal strength is the first step to fixing performance issues. Once you have real numbers instead of guessing based on status bar icons, you can make targeted improvements instead of blindly restarting your router and hoping for the best.