Phone hotspot drops behind concrete walls? How to fix

Your phone hotspot works in one room, then pauses or disconnects when you take your laptop behind a concrete wall. The wall may be weakening the Wi-Fi link, but a phone hotspot also depends on the phone's cellular connection. A quick comparison can help you tell which part is more likely.

Use the Wi-Fi Signal test to watch response time, jitter, and lost requests while you move between locations. It measures how the connection behaves, not the phone's Wi-Fi signal strength in dBm, and it cannot separate the hotspot link from the cellular route to the internet.

Compare the hotspot near and behind the wall

1. Open the Wi-Fi Signal test on the laptop or other device connected to your phone's hotspot. Keep the phone in its usual position.
2. Watch the live results while the connected device is close to the phone. Note whether response time stays fairly steady and whether requests are lost.
3. Move only the connected device to the problem spot behind the concrete wall. Keep the phone and its position unchanged, then watch the results again while reproducing the dropout.
4. Return the connected device to the first spot and compare once more. This helps avoid mistaking a temporary cellular or network change for a wall-related problem.
5. If the connection gets worse behind the wall, move the phone hotspot to a new position, such as near an open doorway, and repeat the comparison.

Pause large downloads and video streams during the comparison if you can. Other traffic can make response times rise or cause lost requests, even when the wall is not the cause.

What the results mean

The connection worsens only behind the wall

If response time becomes less steady or requests are lost in the blocked spot, but the connection behaves well nearby, the hotspot's Wi-Fi signal may be having trouble reaching the device. Concrete can weaken radio signals, and thick or reinforced walls can make the effect more noticeable. Try changing the phone's position or the hotspot band.

The connection drops in both locations

The concrete wall may not be the main issue. The phone's cellular data connection, a busy mobile network, or traffic from another connected device could be causing interruptions. Repeat the test in a location where the phone gets a better cellular connection, while keeping the connected device close to it.

The results look steady, but apps still pause

A brief test may not catch an intermittent problem. Keep the test open while the dropout happens, and compare the result with what the affected app does. A single browser test also cannot prove that every website or service is reachable, because each can use different servers and connection paths.

The phone itself disconnects or stops sharing

This points more toward the hotspot settings, battery behavior, or the phone's cellular connection than toward the wall alone. Check whether the phone has disabled its hotspot, lost mobile data, or switched to a power-saving mode.

How to fix the dropouts

1. Move the phone closer to an opening. Put it on a shelf or table near a doorway rather than on the floor or behind furniture. Keep it where cellular reception is still good, since moving it can improve one connection while weakening the other.
2. Try a different hotspot band. If the phone offers a choice between 2.4 GHz and 5 GHz, test both from the problem spot. A 2.4 GHz connection often reaches farther through obstacles, while 5 GHz can be faster nearby but more easily weakened by walls. The available setting and its name depend on the phone.
3. Check the hotspot settings on the phone. On an iPhone, open Settings › Personal Hotspot and check that Allow Others to Join is on. If available, try changing Maximize Compatibility. On Android, look under Settings › Network & internet › Hotspot & tethering, or the similar hotspot section used by your phone, for band or compatibility options.
4. Reduce competing traffic. Disconnect devices that are not needed and pause cloud backups, updates, and large downloads. Several devices sharing one phone can use up its mobile data capacity and make response times less steady.
5. Reconnect the laptop to the hotspot. Turn Wi-Fi off and on, then reconnect. If the problem continues, remove the saved hotspot network and join it again using the current password.
6. Check the connected device's Wi-Fi settings. On Windows 11, open Settings › Network & internet › Wi-Fi and make sure Wi-Fi is on and the correct hotspot is connected. On macOS, open System Settings › Wi-Fi and select the phone's network again.
7. Restart the phone and connected device. Restarting can clear a temporary hotspot or network problem. After both devices reconnect, repeat the same near and behind-the-wall comparison.

Why the test cannot show signal bars

A browser does not get the hotspot's radio signal reading in dBm. Wi-Fi Signal checks what happens to requests as they travel from the connected device through the phone and mobile network to a server. Response time is how long a request takes, jitter is how much that time varies, and lost requests indicate that some checks did not get a reply.

That means a worse result behind the wall is useful evidence of a connection problem, but it is not a direct measurement of the wall or the phone's radio signal. Compare locations under similar conditions, and use the result alongside whether the phone itself has a reliable cellular connection.