It's quite common for a smartphone with an active mobile internet connection to refuse to broadcast the network to another device, and it can catch you off guard at the most inopportune moment. The user attempts to activate the hotspot, but the connected device either doesn't see the network at all, displays "No internet access," or simply disconnects immediately after attempting to log in. This isn't just a minor inconvenience, but a serious communication failure between devices that requires a systematic approach to troubleshooting.
The reasons for such system behavior can be hidden in a variety of layers: from a banal software failure in Android This can range from severe restrictions from your mobile operator, which aren't always obvious. Often, the problem lies in incompatible frequency bands or static settings on the receiving device that conflict with the transmitting phone. Understanding the mechanics of this process allows you to quickly identify the root cause and restore the connection without calling a service center.
In this article, we'll examine in detail all possible scenarios for why Wi-Fi isn't being shared between phones and offer specific troubleshooting steps. We'll cover the technical nuances of protocols, the specifics of data plans, and hidden settings that many people aren't even aware of. It is critically important to check the network type (APN), as this is where the traffic distribution ban is most often hidden.
Checking basic settings and network status
The first thing you need to do if you're having trouble sharing Wi-Fi between phones is to rule out basic configuration errors. Users often forget that for a hotspot to work, not only the Wi-Fi module itself must be enabled, but also mobile data must be allowed. Check whether the 4G or 5G icon is lit in the status bar when Wi-Fi is disabled. If there's no internet connection on the device sharing the Wi-Fi, then there's nothing for it to share.
Next, you should make sure that the network name (SSID) and password are entered correctly on the receiving device. System Android It's case-sensitive and sensitive to extra spaces that may have been accidentally inserted during copying or manual entry. It's also worth paying attention to the number of connected clients: many smartphones by default limit the number of simultaneous connections to one device, and attempting to connect a second phone will result in an authorization error.
It's important to check whether Data Saver or Airplane Mode is enabled on one of your devices. These features can block background data transfers or completely disable radio modules to conserve battery life. Sometimes, a simple restart of the modules can help: turn Airplane Mode on and off to reset network settings and re-register with the carrier's network.
- 📡 Make sure that mobile data is enabled on the sending phone and the corresponding indicator is on.
- 🔑 Double-check your access point password, eliminating typos and extra characters in the security settings.
- 📱 Limit the number of connected devices in the access point settings to one for testing.
- 🔄 Restart both smartphones to clear temporary network errors.
⚠️ Attention: If, after turning on the access point, the 4G/5G icon disappears or changes color, this may indicate that the operator is blocking the distribution or that the signal in your area is weak and cannot withstand the load of creating its own network.
Don't ignore session lifetime either. Some carriers and phone models automatically turn off the access point if there's no active traffic for a certain period of time (for example, 5 or 10 minutes). This is done to save power, but may be perceived by the user as a malfunction. Try launching a heavy page or video on the second phone immediately after connecting to "wake up" the channel.
Issues with frequency range and security protocols
One of the most common technical reasons why Wi-Fi isn't working is incompatible frequency bands. Modern smartphones often create a hotspot in the default range. 5 GHz, as it offers higher speeds and is less susceptible to interference. However, many older or low-end phones, tablets, and IoT devices are physically unable to operate on this frequency and only see 2.4 GHz networks.
To resolve this issue, you need to access the access point's advanced settings. The path typically looks like this: Settings → Connections → Mobile hotspot → Setup → Wi-Fi bandHere you need to force the switch from "5 GHz" or "Preferred" to "2.4 GHz." This will make your network visible to the vast majority of devices, even those manufactured 5-7 years ago.
The second important aspect is the security protocol. If the sending phone has an older encryption type (such as WPA) and the receiving device requires WPA2/WPA3, or vice versa, the connection will fail. In the access point settings, find the "Security Type" or "Security Protocol" option and select WPA2 PSK — is the most universal standard, supported by almost all Android and iOS devices.
Hidden SSIDs are also worth mentioning. If you've ever enabled the "Hide My Device" feature or something similar, the client phone simply won't see the network in the list of available networks. You'll have to manually enter the network name on the second device, which often leads to errors. For troubleshooting purposes, it's best to temporarily unhide the network.
Sometimes the problem lies with the broadcast channel. If there are a lot of neighboring networks in your home, they may be clogging up the airwaves. In the access point's advanced settings (if available on your model), you can try changing the channel from "Auto" to a fixed one, such as 1, 6, or 11, which are considered the least noisy in the 2.4 GHz band.
Operator restrictions and tariff plan
The most difficult reason to bypass the problem of phone-to-phone Wi-Fi sharing isn't the device itself, but your data plan. Many carriers have been imposing strict restrictions on mobile data tethering in recent years. Even if you have an unlimited data plan, it only applies to your smartphone, and attempts to tether to a laptop or another phone will be blocked or charged separately.
Operators determine the fact of distribution in several ways. The simplest is by analyzing the parameter TTL (Time To Live). When you share internet, this parameter in data packets is reduced by one. The carrier sees the changed TTL and understands that the traffic is not coming directly from the phone, but through an intermediary device. In response, they can either throttle the speed to 64-128 kbps or completely block the connection, redirecting to a page demanding payment.
Another method is analyzing the User Agent of requested pages. If your phone suddenly starts sending requests typical for desktop browsers or operating systems like Windows, the operator assumes you're seeding. Some providers also analyze installed apps on the device, blocking popular seeding programs.
| Detection method | How does this work | Operator reaction |
|---|---|---|
| TTL analysis | Checking the data packet lifetime | Blocking or speed reduction |
| User-Agent | Checking the device type in the request | Redirect to the payment page |
| Deep Packet Inspection | Deep analysis of packet contents | Complete ban on distribution |
| Traffic limit | Separate counter for distribution | Disconnection after limit is reached |
⚠️ Attention: Tariff terms and blocking methods may be changed unilaterally by operators. Always check your personal account or your operator's official app for up-to-date information on tethering availability.
If you suspect the issue is with your carrier, try connecting with a different SIM card from a different provider. If tethering works with the other card, the issue is with your plan or restrictions from your primary carrier. In this case, either upgrading to a more expensive plan where tethering is officially allowed or using special workarounds (such as changing the TTL via root access) may help, although the latter may violate the user agreement.
IP address conflicts and DHCP settings
Within the local network created by the phone, a DHCP server is responsible for distributing addresses. If the receiving phone previously had static IP addresses assigned to other Wi-Fi networks (such as a home or work network), these may conflict with the range assigned by the mobile phone's access point. This leads to a situation where the device appears to be connected, but the internet is inoperative.
To fix this, find your network in the list of saved networks on the receiving device, tap "Forget Network" or "Delete," and then reconnect. This will force Android to request a new IP address automatically. It's also worth checking that the receiving phone isn't set to "Use Device MAC Address" instead of randomized if the network uses address filtering, although this is rare for home hotspots.
Another issue is subnet conflicts. If you're trying to share internet with a phone that's simultaneously connected to another Wi-Fi network (via guest mode or Dual Wi-Fi), a routing conflict may occur. Make sure the receiving device has other active network interfaces disabled when connecting to your access point.
- 🗑️ Tap "Forget Network" on the receiving phone and re-enter the password to reset the IP.
- 📝 Make sure that the receiving device's Wi-Fi settings are set to "Obtain IP automatically" (DHCP).
- 📡 Turn off Bluetooth on both devices to avoid interference in the 2.4 GHz band.
- 🔄 Reset the network settings on the receiving phone if the problem persists.
In rare cases, manually changing the access point's IP address on the broadcasting phone can help, if this option is available in the advanced settings (root access or specific software is required). The default gateway is usually 192.168.43.1, but you can try changing it to avoid conflicts with previously saved profiles.
How to reset network settings on Android?
Go to Settings → System → Reset → Reset Wi-Fi, mobile data, and Bluetooth settings. Please note that this will delete all saved passwords for Wi-Fi networks and Bluetooth devices.
Software crashes and network service cache
operating system Android The system is complex, and over time, errors can accumulate in its network modules. The service responsible for the access point can become stuck in an incorrect state, especially if the phone hasn't been rebooted for a long time or if the Google Play Services system components have recently been updated. In this case, the external settings may be perfect, but the internal mechanism simply won't start the broadcast.
The first step should be to clear the network services cache. Go to Settings → Applications → Show system processesFind apps related to "Wi-Fi," "Hot Spot," "DUN," or "Tethering." For these apps, select "Storage" and tap "Clear Cache." Don't worry, this won't delete your personal data, only temporary configuration files.
If a simple wipe doesn't help, try a more radical but effective method: resetting network settings. This function returns all network settings (Wi-Fi, Bluetooth, mobile networks) to factory defaults. This often solves the problem of Wi-Fi not working between phones due to "garbage" in the configuration files.
⚠️ Attention: Before resetting your network settings, be sure to write down the passwords for important Wi-Fi networks, as you will have to re-enter them on all your devices after this procedure.
It's also worth checking for system updates. Sometimes hotspot bugs are fixed in security patches. Go to Settings → Software Update and check your Android version is up-to-date. If you're running a beta version of the system, the issue may be a known developer bug, in which case your only option is to wait for a fix or roll back to a stable version.
☑️ Actions in case of software failure
The Impact of Third-Party Apps and VPNs
A common cause of Wi-Fi problems is the use of user-installed apps. These primarily include VPN services, antivirus programs with "Network Protection," and various firewalls. When you enable a VPN on the phone that's sharing the connection, it creates a virtual network interface through which all traffic flows. By default, Android's hotspot can't forward this VPN traffic to connected devices, leaving them without internet access.
To share the internet via a VPN, you need to either use specialized applications that can create proxy servers (such as HTTP Injector or specialized tethering applications) or configure forwarding at the system level (which requires root access and knowledge of iptables). In normal mode, try completely disabling the VPN and testing the access point.
Antiviruses and "optimizers" can also block incoming connections, considering them suspicious. If you have a third-party antivirus (not built-in Google Protect), try completely disabling its real-world protection for the duration of the test.