1. Compare Ethernet with Wi-Fi
If possible, test with a computer connected via Ethernet. If the wired connection is much faster, Wi-Fi is probably the bottleneck. If both are slow, investigate the modem, provider, plan or network usage.
2. Test in the same place with the same device
Comparisons are useful only if you change one factor at a time. The same device, test server and approximate time tells you far more than random tests from several different phones.
3. Check distance and obstacles
Walls, reinforced concrete, metal, floors between stories, aquariums and furniture can weaken the signal. Position the router in an open, central place, not inside a closed cabinet or near other sources of interference. Even moving it a few metres can noticeably change radio conditions in a problem room.
4. 2.4 GHz versus 5 GHz
2.4 GHz generally reaches farther and penetrates obstacles better, but is often more congested and has less available bandwidth. 5 GHz is often faster over shorter distances. The right choice depends on the space and client device; compare both where you actually use the device.
5. Check channels and neighbouring networks
In an apartment building, several networks may compete for the same airtime. Automatic channel selection often helps, but it is not perfect. If problems worsen significantly in the evenings when neighbours are active, channel congestion is more likely than a broken internet subscription.
6. Compare one device at a time
An old Wi-Fi adapter, power-saving mode, driver or phone limitation may make the whole network seem slow. Test at least two devices in the same location. If only one is slow, investigate that device first.
7. Look for background activity
Cloud backups, updates, game consoles, TVs or other computers can saturate the download or upload. A saturated upload can increase ping dramatically. Repeat the speed test when heavy transfers are idle.
8. Don't chase only the Mbps number
Video calls and gaming also depend on latency, jitter, packet loss and stability. A very high Mbps figure is no help if the connection periodically drops packets. If web pages load quickly but video calls stutter, raw speed may not be the issue.
9. When does mesh or another access point help?
If coverage is the issue, an extra access point with wired backhaul is often a predictable solution. Mesh can simplify coverage across a larger home, but its inter-node connection also needs a good signal or wired backhaul. Adding a node inside a dead zone does not magically create a good link.
A quick diagnostic order
- Ethernet versus Wi-Fi.
- Near the router versus the problem room.
- 5 GHz versus 2.4 GHz.
- One device versus another.
- Idle connection versus heavy transfers.
- Only then consider replacing hardware or changing your subscription.
Frequently asked questions
Do more antennas always mean faster Wi-Fi?
No. Standards, radio conditions, the client, channel width, MIMO configuration and placement all matter.
Will mesh always fix the problem?
No. Mesh can improve coverage, but poor links between nodes or bad placement still limit speed.
Why is Wi-Fi good in the morning but bad at night?
Local Wi-Fi spectrum or your internet link may be more congested. Compare Ethernet and Wi-Fi at the same time to distinguish the cause.
Should I immediately buy a new router?
No. First establish whether the limit really is the router, rather than a device, placement, busy channel or the internet connection.