A situation when you urgently need the Internet, and there is mobile data on the main device, but Share Wi-Fi from phone to phone It's understandable that connection issues don't work. You try to turn on the hotspot, but connected devices either don't see the network, are stuck in the "Obtaining IP address" status, or display the "Failed to connect" error. This is a common problem that can be caused by either operating system software issues or limitations imposed by your mobile operator.
Users often think that the problem lies in a faulty antenna or communication module, but in most cases the problem lies in incorrect settings. APN, frequency band conflicts, or the number of connected clients has been reached. Understanding how tethering works allows you to quickly diagnose the cause and restore the connection without rebooting your device or performing a factory reset.
In this article, we will examine in detail the main reasons that block signal transmission and propose specific action algorithms for devices based on Android And iOSIt's important to keep in mind that smartphone software is constantly updated, and the menu layout may vary slightly depending on the OS version or manufacturer's shell.
Checking basic settings and connection status
The first thing you need to do if your phone isn't sharing Wi-Fi is to make sure the basic settings are correct. Users often forget that for a hotspot to work, not only the Wi-Fi module itself must be enabled, but also mobile data. Without active mobile Internet There is nothing to broadcast, even if the "Access point" slider is green.
Pay attention to the number of connected devices. The default settings for Android and iOS often limit the number of clients, which can be one or two by default. If your smartphone is already connected to a laptop, the second phone will simply not allow access to the network, considering the limit to be reached. It's also worth checking whether "Data Saver" or "Airplane Mode" are enabled, as these can block background sharing processes.
It's also important to check the network name (SSID) and password. If the access point name uses special characters or Cyrillic, some older phone models may simply not see the network or refuse to connect. It's recommended to use Latin letters and numbers, and set a password of at least 8 characters to comply with security standards. WPA2.
Bandwidth and device compatibility issues
One of the most common technical reasons why Wi-Fi doesn't work between phones is frequency band incompatibility. Modern smartphones often create a network in the default range. 5 GHz, which provides high speed but has a shorter range and is less able to penetrate walls. Older or budget phone models may simply not see 5 GHz networks, as their Wi-Fi modules are designed only for 2.4 GHz.
To remove this barrier, you need to force the access point to switch to compatibility mode. In the broadcasting phone's settings, find the "AP Band" or "Frequency Range" option and select the value 2.4 GHzThis action will make the network visible to the vast majority of devices, even those released several years ago.
Additionally, consider the distance between devices. When using the 5 GHz band, phones must be in close proximity to each other. If you move to another room, the signal may be interrupted, and the client phone will stop receiving data packets, even though it's technically connected to the network.
What is the difference between 2.4GHz and 5GHz when tethering?
The 2.4 GHz band offers greater range and better penetration, but is susceptible to interference from microwave ovens and neighboring routers. The 5 GHz band offers high speed and clear air, but has a significantly shorter range and is less effective at penetrating concrete walls.
APN settings errors and mobile operator restrictions
Mobile operators often impose technical restrictions on using a smartphone as a modem. If you don't have the "Modem Mode" or "Unlimited Internet" option enabled in your plan, the operator's system may block data sharing with other devices. In this case, the internet on the phone itself works, but when trying to share Wi-Fi from one phone to another, the speed drops to zero or pages stop loading.
The key element here is the settings access point names (APNs)The operator may require specific parameters or, conversely, block the default settings if it detects that traffic is going through a NAT (network address translation). Sometimes, creating a new access point with the same parameters but a different protocol type helps.
⚠️ Attention: Tariff plan terms and technical limitations imposed by telecom operators are subject to change. We recommend checking the current APN settings and data sharing conditions in your operator's personal account or on the official website.
To check and edit APN settings on Android, you need to go to the menu Settings → Connections → Mobile networks → Access point names (APN)Here you can try resetting the settings to factory defaults or creating a new access point by copying the parameters of the existing one, but changing the APN type to default,supl,dunAdding a parameter dun (Dial-Up Networking) sometimes allows you to bypass distribution blocking.
☑️ Check APN settings
Software conflicts and energy saving
Aggressive power-saving algorithms are the bane of modern smartphones. The system can forcibly disable Wi-Fi or limit background data transfers if it detects that the battery is draining too quickly. As a result, Wi-Fi sharing between phones may drop out after a few minutes or fail to start at all.
You need to check the battery optimization settings for system processes responsible for networking. These menus have different names on devices from different manufacturers: "Optimization," "Device Care," or "Battery." Find the "Wi-Fi Hotspot" or "Tethering" process and set its operating mode to "Unlimited."
Third-party antivirus programs or VPN clients can also cause the issue. If a VPN is activated on your phone, it may intercept all traffic and not send it to the local network created by the access point. Try temporarily disabling your VPN and firewalls to see if the issue resolves.
| Symptom | Probable cause | Solution |
|---|---|---|
| The phone connects, but the internet doesn't work. | Operator blocking or DNS errors | Change APN, disable VPN |
| The device does not see the Wi-Fi network | Frequency incompatibility (5 GHz vs. 2.4 GHz) | Switching the range in the point settings |
| The access point turns off by itself | Power saving mode | Disabling power saving for the modem |
| Error "Failed to obtain IP" | IP address or DHCP conflict | Restart both devices, reset network |
Specifics of distribution on Android and iOS
Operating systems approach tethering (sharing the Internet) differently. On devices iPhone Personal Hotspot is tightly integrated with the Apple ecosystem. If you share your internet connection with another iPhone or iPad connected via iCloud, the connection can be established automatically without a password, but this can sometimes lead to conflicts if the accounts are out of sync.
On Android The situation is more variable due to the vast number of skins (MIUI, OneUI, ColorOS). Some firmware (for example, Xiaomi) have a separate "Use Mobile Data" setting that must be enabled manually. Without this, the phone may attempt to share the Wi-Fi it receives from another router, rather than mobile data.
USB tethering is also worth mentioning. If Wi-Fi tethering is completely unresponsive, you can try connecting your phone to a computer or another phone (via OTG) with a cable. USB tethering is often more stable and unaffected by interference, although it does require a physical cable.
Why can't my iPhone see my Android hotspot?
Often, the problem lies in the security protocol. An iPhone may require WPA2, while Android accidentally selects WPA3 or open mode. Try changing the security type to WPA2 PSK.
Radical methods and resetting network settings
If none of the above methods work, and Wi-Fi is still not working between phones, the last effective option is to reset your network settings. This doesn't delete your personal data (photos, contacts, apps), but it does erase all saved Wi-Fi passwords, Bluetooth settings, and mobile network settings.
After a reset, the phone returns to the factory network module configurations, which often fixes deep software errors accumulated over time. On Android, this is done via Settings → General → Reset → Reset network settingsOn iOS, the path looks like this: Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings.
After completing this procedure, you'll need to re-enter your SIM card password (if a PIN is set) and reconnect to the desired Wi-Fi networks. In 90% of cases, this resolves the issue unless it's due to a physical failure of the antenna module.
⚠️ Attention: Before resetting your network settings, make sure you remember the passwords for important Wi-Fi networks you'll need to reconnect to. Also, make sure you have internet access via your mobile network for the initial setup.
In rare cases, the problem may be hardware-related. If, after a reset and firmware update, the device heats up in the antenna area and the network connection comes and goes, diagnostics at a service center may be required. However, more often than not, the issue lies in software conflicts or operator settings.
Why does the client phone say "Connected, no internet access"?
This means there's a connection between the devices, but the sending phone isn't transmitting data from the external network. Check if the source phone has internet access (turn off Wi-Fi and try accessing a website). If there is internet access, the issue lies with the APN settings or is blocked by the carrier.
Is it possible to share Wi-Fi if the phone has a SIM card with a locked modem?
Technically, you can distribute a signal, but the internet won't work. Some carriers flag tethering traffic and either cut the speed or redirect you to a payment page. This can be circumvented by changing the TTL (requires root access) or using special apps, but this violates the terms of the contract.
How many phones can be connected to a hotspot at the same time?
Modern smartphones typically allow you to connect 5 to 10 devices simultaneously. However, if more than 3-4 active users are connected, the internet speed on each device will drop significantly, and the device sharing the connection may become very hot.