Risoluzione dei problemi Wi-Fi: una guida pratica

Before changing settings, get a baseline. Run our Test rete per controllare la velocità di download, la latenza e il jitter. Annotare i numeri, quindi confrontare dopo ogni soluzione sottostante per sapere cosa ha effettivamente aiutato.

1. Riavvia il router e il modem: scollegali entrambi per 30 secondi, collega prima il modem, aspetta un minuto, poi il router.
2. Riavvia il dispositivo che ha problemi, metà dei problemi Wi-Fi persistenti sono dovuti a uno stack di rete bloccato sul dispositivo, non alla rete.
3. Verifica se altri dispositivi sulla stessa rete hanno lo stesso problema. Se solo un dispositivo ha difficoltà, il problema è locale a esso.
4. Avvicinati temporaneamente al router per escludere problemi di distanza e interferenza.
5. Controlla la pagina di stato o l'app del tuo ISP per un'interruzione nota nella tua zona.

Ciò significa che il tuo dispositivo ha un collegamento al router, ma il router non ha internet o non lo sta trasmettendo.

1. Verifica se altri dispositivi sulla stessa rete Wi-Fi possono navigare. Se nessuno può, il problema è il router o la connessione ISP, non il tuo dispositivo.
2. Guarda le luci del modem, una luce fissa "internet" o "online" dovrebbe essere accesa; lampeggiante o spenta di solito significa nessun segnale dall'ISP.
3. Prova a collegare un computer direttamente al modem con un cavo Ethernet, bypassando completamente il router, per isolare se il problema è il router.
4. On Windows, run Settings > Network & internet > Status > Network troubleshooter.
5. Su macOS, tieni premuto Opzione e fai clic sull'icona Wi-Fi nella barra dei menu per visualizzare diagnostici dettagliati, oppure apri Diagnostica Wireless da Spotlight.

Sospetta un guasto hardware effettivo quando:

• Le spie del router mostrano un modello di errore hardware (controlla il manuale per il significato di una spia rossa o che lampeggia ripetutamente sul tuo modello specifico).
• Un ripristino delle impostazioni di fabbrica e un aggiornamento del firmware non cambiano nulla, e il problema persiste su ogni dispositivo connesso.
• Il router ha più di 4-5 anni e fatica anche con pochi dispositivi connessi; l'hardware obsoleto semplicemente non può gestire i carichi di traffico moderni e gli standard Wi-Fi.
• Un dispositivo specifico non riesce a ottenere un buon segnale ovunque in casa mentre altri funzionano bene lì; l'antenna o l'adattatore Wi-Fi di quel dispositivo potrebbero essere la causa reale, non la rete.

Se hai isolato il problema alla connessione del tuo ISP piuttosto che alla tua attrezzatura, contatta direttamente loro; nessuna quantità di risoluzione dei problemi del router risolverà un guasto dalla loro parte della linea.

Slow Wi-Fi is really three distinct faults with three different fixes, and treating them as one problem is why so much troubleshooting goes nowhere. The first is low bandwidth, where pages load but large downloads crawl. The second is high latency, where bandwidth looks fine but everything feels sluggish and video calls stutter. The third is instability, where speed is fine most of the time but the connection drops repeatedly.

Measure before you change anything. Run a speed test next to the router and again where you actually use the device. A big gap between the two means a coverage problem inside your home, which no amount of contacting your provider will fix. Similar numbers in both places mean the incoming connection itself is the limit, and that is a conversation with your provider rather than a router setting.

Wi-Fi is radio, and radio is defeated by physics long before it is defeated by hardware. A router in a cupboard, behind a television, on the floor, or in a corner of the house is working against every law of signal propagation. Moving the same router to a central, elevated, open position frequently doubles usable coverage without spending anything.

• Concrete, brick and anything containing metal or water absorb signal heavily, including mirrors, radiators, fish tanks and foil-backed insulation.
• Every floor between the router and the device costs roughly as much signal as a thick wall.
• Microwave ovens, cordless phones and older baby monitors interfere directly with the 2.4GHz band.
• Keep the router at least a metre from other electronics and never inside a metal enclosure.
• If coverage still fails at the far end of the house, a mesh system beats a repeater, because repeaters halve throughput on the band they retransmit.

Most routers broadcast on both 2.4GHz and 5GHz, and newer ones add 6GHz. They behave very differently. 2.4GHz travels further and passes through walls better but carries less data and is heavily congested in flats and terraced housing. 5GHz is much faster with far less interference but loses strength quickly through solid walls.

• Use 5GHz for laptops, phones and streaming devices in the same or an adjacent room as the router.
• Use 2.4GHz for smart home devices, garden cameras and anything at the far edge of coverage.
• If both bands share one name, a device may cling to the weaker one, temporarily splitting the names helps diagnose it.
• On 2.4GHz choose channel 1, 6 or 11, they are the only three that do not overlap each other.

When a connection degrades gradually over days, the cause is usually accumulated state in the router rather than anything you did. A structured restart clears it properly, and the order matters.

1. Power off the modem and the router, and unplug both at the wall.
2. Wait a full sixty seconds so capacitors discharge and the provider releases the session.
3. Power the modem on first and wait for its lights to settle completely.
4. Power the router on and wait a further two minutes before testing.
5. Run a speed test from the same spot each time so you have comparable numbers over weeks.

Keep a short log of results with dates. If your provider disputes a performance problem, a series of timestamped measurements from the same location is far more persuasive than a description, and it also reveals patterns such as slowdowns only during evening peak hours, which point to network congestion rather than anything in your home.

Intermittent network problems are difficult to fix precisely because they are gone by the time anyone looks. A short written record turns a vague complaint into evidence, and it often reveals the cause on its own once a pattern appears.

• Test from the same two places each time, next to the router and where the problem occurs.
• Record download speed, upload speed, latency, the time of day and which band you were connected to.
• Note anything unusual, a new appliance, a neighbour's new router, a firmware update or a house full of guests.
• Test both wired and wireless where possible, the difference separates your home network from the incoming line.
• Keep at least a week of readings before drawing conclusions, single measurements mislead constantly.

With that record, decisions become straightforward. Consistent shortfalls on a wired connection belong to your provider, wireless-only shortfalls belong to placement and interference, and problems confined to particular hours point to congestion that no equipment change will remove.