If video stops, meeting audio breaks up, or a Wi-Fi network appears but cannot reach the internet, record what happened before applying for another service. A problem with a device or an indoor connection may remain even if you add a new line.
Use only your own devices and networks you are allowed to use. Do not operate equipment in a shared room or change building equipment. Ask the property manager who owns installed devices and which steps residents may take.
Separate Wi-Fi connection from internet access
Check that you selected the network named in your move-in instructions. Do not try nearby networks with similar names. On iPhone with iOS 26, Apple’s guide shows the connection in Settings > Wi-Fi. A check mark means the phone is connected to Wi-Fi; it does not prove that websites or meeting services are working.
For each incident, record the date and time, room location, device model and OS, network or cable used, the exact connection message, affected tasks, other devices, and any visible indicator or error. Mark unknown details as unknown.
A phone may switch from Wi-Fi to mobile data. Apple’s iOS 26 guide explains that Wi-Fi Assist may use mobile data when Wi-Fi is poor. If you need to compare the home Wi-Fi alone and it is safe to lose connectivity briefly, you can temporarily turn mobile data off on your own phone, then restore the setting. Do not interrupt an emergency or work connection just to test. Keep screenshots private if they show passwords, account data, or identifying room details.
Compare one condition at a time
You do not need to buy another device to make these comparisons.
| Comparison | What it can help you record |
|---|---|
| Your own second device on the same Wi-Fi, same place | Whether the symptom appears on one device or more than one. |
| Same device and Wi-Fi in another room location | Whether the symptom changes with location. |
| Same device, place, and task at another time | Whether the symptom occurs at particular times. |
| Another site or app on the same connection | Whether one service or several are affected. |
| Same device on another network you are permitted to use | Whether the symptom occurs away from the rental too. |
These checks show how the symptom changes; they do not identify the faulty component. Only compare wired service if the manager or provider has confirmed the outlet and method. Never bypass authentication or connect directly to shared equipment.
Restart only equipment you are allowed to manage
Save your work and check the official steps for the exact model before restarting your own device or router. Apple’s iOS 26 guide describes a normal iPhone power cycle; that is different from resetting network settings or erasing the phone. The manual example for a personally owned BUFFALO WSR-1500AX2S series has a restart option separate from initialization.
A router and upstream device restart sequence can interrupt other users. BUFFALO’s FAQ describes a sequence for particular wiring, but it is not permission to operate a rented ONU or building equipment. If the model, ownership, wiring, or permission is unclear, ask the property manager or support desk first. Do not factory-reset equipment, remove encryption, or change a contract as part of this check.
Check service notices and record any speed test carefully
Use the official outage or maintenance page for the named provider and service. NTT East’s information covers reported area outages and construction; an empty notice does not rule out a room-specific issue or another provider’s issue. Record when you checked, the affected area and period, and the relevant service.
A speed test is optional. If you run one, keep the service name, time, device, OS, connection method, location, connected devices, and other active traffic with the result. Maximum advertised speed is not the same as actual speed. A single number does not prove the building connection is slow or that a new router will fix it. Large tests can use mobile data, so check the connection and plan first.
Give the record to the right support desk
Contact the property manager if the service desk or equipment ownership is unclear, or if shared equipment is involved. Use the provider’s support process for the installed internet service. Contact the device maker about your own phone or router. Include when and where the issue occurs, whether Wi-Fi connects, which tasks fail, how many devices are affected, the comparisons you tried, visible model/indicator details, and what remains unknown.
Share address, room number, or contract details only through the proper support channel when needed. Do not send passwords or authentication codes. The symptom record prepares a support request; it does not diagnose a fault or establish that repair is required.
If your normal needs still cannot be met after the provider or property conditions are clarified, compare connection types in the guide to choosing fiber, a home router, and mobile Wi-Fi. Do not add a contract solely because of an unexplained symptom.
Official sources (Japanese)
The Japanese source file records each reference’s scope and its own verification date. The sources below are in Japanese.
