Which room with the best signal for the Mesh sub-router? Don't believe my phone is full—I tested eight points while holding my phone before deciding
Last year AX3000T during Double 11, I bought a Redmi and set up a Mesh device at home. On the day it arrived, I plugged in the battery, connected with one click, and checked my phone to full bars. I thought it was all set. But in the master bedroom, I still scroll through videos at night, and in the study, I have video calls three times every ten minutes. The sub-router was placed next to the TV cabinet in the living room—less than four meters from the main router, with signals from both machines stacked together, so the farthest room didn't get any light at all. Later, after I measured the whole house with my phone, I realized that where the router is placed is a measurement issue, not a sensory issue. .
clarify first: Why does a phone with a full frame be deceived
I used to judge signal quality by looking at the WiFi icon on my phone, but this time I stumbled and realized there are at least three pitfalls.
First, the frame refresh rate is especially slow. You walk from the living room to the master bedroom, the icon is still full bars and you can't react in time; the actual signal has long since dropped to the edge. By the time you see the drop in the frame, that spot is already unusable.
Second, the dual-band integration name is the same, and phones often display 2.4G bars. 2.4G is strong for wall penetration, and you can still leave three blocks between two walls, but if you use 5G for video streaming, 5G has long been outdated. Looking at the full-slot internet SIM card, it's probably this misalignment.
third, the grid count is too thick. The four-bar scale can't tell the difference between -60 and -72, and in practice, these two numbers are the difference between 'smooth' and 'late-rush hour card as a PPT.' So later, I used numbers to speak exclusively, using grid numbers as references.
Before
start, draw a diagram: How to determine the three types of points
don't just keep your phone running around the room. First, draw a sketch of the floor plan on paper, mark the three types of points, and measure them in a well-organized way.
First Category: The override edge of the main route. start from the main route and move farther away, find the signal that drops from "good" to "bare" — this is the area you really need to save. My family uses two AX3000T: the main route is in the living room TV cabinet, and at the end of the corridor, the reading is -68, the bedside in the master bedroom is -78, and the study is -73—these three points are the candidate battlegrounds.
Type 2: Candidate sockets for sub-routers. routers need to be plugged in, and you can only put them in a few places: on the hallway shoe cabinet, on the second floor of the study bookshelf, and on the bedside table in the master bedroom. Mark these locations one by one on the map. Don't take it for granted—I never even considered the socket in my hallway at first.
Third category: Where you actually use the net. sofa, bedside table, above the toilet, study desktop—the ultimate goal of testing is to make these points comfortable, not to make the whole house map look good.
three ways to view numbers on your phone
want to see RSSI signal strength values, Android, iPhone, and Xiaomi users each have their own paths, and I've tried them all.
Xiaomi router users the easiest way: open the Mi Home app, go to the router's device page, find the "WiFi Toolbox," where the signal detection directly shows the current connection strength and can check whether the connection is 2.4G or 5G. Later, when I reviewed roaming stickiness, I also relied on it. the article about roaming without switching it was written in even more detail.
Android phones, you can install free tools like WiFi Analyzer to view the whole house signal and check the channel usage of neighbors' homes. Some models also display network status in the "Developer Options" section.
iPhone the most troublesome thing is that the system doesn't directly provide RSSI. My method is to use a test website for just a makeshift comparison (search for speedtest to see latency and jitter), or use a family member's Android device as a measuring device. If you want to be serious, install Apple's official AirPort utility and enable Wi-Fi scanning in Settings, but the entrance is hidden deep.
both lines had to be tested: the phone side and the return trip. Most people only tested the first one
This is my biggest gain this time. Is it good to place a sub-router in a certain location? Actually, it's two sections:
section is phone to the sub-router —you hold your phone and stand next to the candidate seat, reading the numbers. This part is easy to test, everyone understands.
another segment is the return from the sub-route to the main route—whether the sub-route receives signals from the main route determines its maximum output speed. The return trip is fragmented, and even if the phone is fully barred with a sub-router, it's useless—data can't be sent back. For wireless backhaul machines, especially this is important; wired backhaul (if the network cable is plugged in), you can skip it.
test the return route, there's a simple method: place your phone at the sub-router candidate position and observe the reading from the main router at this position, which is roughly equal to the signal the sub-router can receive there. At the bedside table in my master bedroom, my phone receives the main router at -75, and the sub-router is at this number for the return trip. No, it doesn't work. Later, I specifically told my friend, and he said his phone router was just stuffed into the balcony locker, costing over 80 yuan on the return trip. No wonder it always lags.
conclusion: sub-routing should be placed at the attenuation level around -65 to -70 of the main route signal If it's too close (below -50), two machines overlap and waste one; if it's too far (outside -75), the return trip can't hold up. This was also mentioned in the article about roaming, and when it comes to site selection, it's the strictest rule.
measured data from 8 locations at my home
devices are two AX3000T, with the main router in the living room. Both readings are on the 5G band, measured around 9 PM:
| point | receive the main route signal | determine |
| the living room sofa | -45 | main route core area, No need to worry about |
| dining | -52 | good |
| shoe cabinet in the middle section of the corridor | -63 | Route Candidate A, return trip meets standards |
| Study Bookshelf Second Floor | -68 | Route Candidate B, return trip barely |
| study desk | -73 | target to save |
| the master bedside | -78 | was the worst, with the main rescue target |
| master bedroom bedside table (a sub-router) | -75 | unable to return and gave up |
| balcony storage cabinet | 81 | dead corner, who places it to know |
in the end, I placed the sub-router on the shoe cabinet in the middle of the corridor: the return trip was steady at -63, the master bedside moved from -78 to -66, the study desk from -73 to -58, and watching videos and meetings was smooth. The candidate spot in the study was actually fine too, but the master bedroom was just a step away, and the corridor was stuck right between the two ends. You see, where the router is placed isn't 'which room is farther away'; it's about keeping candidate slots stuck on the attenuation band between -65 and -70 .
by the way, if you're still torn between Mesh and the AP panel, I've written a comparison AC+AP versus Mesh—look at which one before deciding whether to buy. There are also considerations for where you place the main router. I've the low-voltage box and TV cabinet before. If you're new to networking and don't know how to operate, the entire networking process is in that article.
Finished Placement Doesn't Count: Walk the test once plus the evening peak retest
the location is set, don't rush to finish the work, just two steps away.
the first step, I held my phone and slowly walked from the living room to the master bedroom, watching videos along the way and observing where to switch to the sub-router. The switch point is ideally placed in the corridor; If you get to the head of the master bedroom and still stick to the main router, that's a matter of roaming parameters. look for answers in the roaming sticky , not the router you remove.
Step two: retest during the evening rush hour. The data measured in the morning during the day was optimistic. At 8 or 9 p.m., the neighbor's WiFi was fully on, and with the channel crowded, the reading could differ by three to five dB. My study's spot is -68 during the day and -71 at night, which is acceptable; If it drops directly to -75 tonight, this candidate will have to be reconsidered.
tests show that none of the candidate slots can reach below -70, which means the house is very unfriendly for wireless backhaul. Either you can pull the network cable for wired backhaul in one step, or consider a cheap signal amplifier to hold it up first—I've tested amplifiers, and I've clearly written who is suitable for buying them.
Finally, here's the order: draw the icon and point the position, check the numbers on your phone, test the return trip first, then test the phone, set the decay band at -65 to -70, switch between the test and the evening rush hour. It only takes half an hour, much better than waiting for a lag after assembling the net.
