Wi-Fi slow? 5 quick fixes + full diagnostic

ISP or home network? Separate them first

The most common mistake: "internet is slow" and dial the operator. In 80% of cases the problem is at home. A 5-minute diagnostic separates the two.

Test 1: plug directly into the router via cable

• Connect your laptop with Ethernet to the router
• Measure with fast.com
• Getting 70%+ of your plan — router and ISP are fine, the issue is Wi-Fi
• Less than 70% — call the operator (line, port congestion, cable damage)

Test 2: measure over Wi-Fi

Same device on Wi-Fi. A 50%+ gap = a Wi-Fi network problem.

5 most effective fixes (priority order)

1. Center the router

Wi-Fi propagates as a sphere. From a corner, half the signal goes to the neighbors. Plan:

• Middle of the home (end of the hallway is ideal)
• 1.5 m off the floor — signal radiates down, attenuates up
• Open space — glass and wood are fine; concrete + metal — no
• NEVER next to TV, microwave, aquarium

2. Switch to 5 GHz

Modern routers are dual-band: 2.4 GHz (far, slow) and 5 GHz (near, fast). On your phone you see a "...Modem_5G" network — connect to that. Speed jumps 2-3×.

Band	Max speed	Range	Wall penetration
2.4 GHz	~150 Mbps	70 m	Good
5 GHz	~1000 Mbps	25 m	Poor
6 GHz (Wi-Fi 6E)	~2500 Mbps	15 m	Very poor

3. Change the Wi-Fi channel

In an apartment block with 30 flats all on automatic, channel collision halves your speed. Fix:

• Install Wi-Fi Analyzer on Android
• Find the free channel (1, 6, 11 are the busiest)
• Log into the admin panel (192.168.1.1) → Wireless → Channel → pick manually

4. Update router firmware

A router older than 3 years doesn't support WPA3 and has speed caps. Check:

• Admin panel → System → Firmware version
• If newer is on the vendor site → flash it
• 5-minute process, up to 20% speed bump

5. Upgrade the router

A router older than 6 years (Wi-Fi 4 / 802.11n) can't keep up. A 200 Mbps plan drops to 60. A Wi-Fi 6 router triples speeds.

Recommended in Baku:

• TP-Link Archer AX55 — 200 AZN, AX3000
• Asus RT-AX58U — 300 AZN, more device capacity

When do you need an extender?

When part of the home reads below -75 dBm:

• Home 100 m²+, 2 floors
• Concrete 25 cm+
• 15+ m from the router

BUT: an extender halves the speed (it rebroadcasts). Fine for one bedroom Netflix; not for work.

Mesh systems (3-4 nodes working together)

Mesh (TP-Link Deco, Netgear Orbi, Asus ZenWiFi) preserves speed while covering the home. How:

• 2-3 nodes on the network
• All broadcast one SSID
• Phone roams to the strongest automatically

When to buy:

• Home 150 m²+
• Multi-floor
• 10+ devices simultaneously (smart home)
• Steady video calls / online gaming

Price: 300–700 AZN (starts at 2 nodes).

Signs it's actually the ISP (don't confuse)

• Slowdown at the same time every day (evening peak)
• Slow over cable too
• One of the router LEDs is red ("Internet")
• Neighbors hit the same issue

Despite the folklore, rebooting the router solves only ~10% of cases. 90% is a channel-placement-firmware game. Give it 30 minutes before calling anyone.