The situation where one smartphone can't access the internet through another's hotspot often leaves users stumped. It would seem that the function Mobile Hotspot The password is entered correctly, but the connection either fails to establish or is immediately lost. This is a common problem faced by owners of devices based on Android And iOS.
The reasons for this behavior of gadgets can be hidden in software conflicts, security settings, or even modem hardware limitations. Often, the culprit is the frequency range or a failure in the data transfer. IP addressesIn this article, we'll take a detailed look at every aspect that interferes with network stability.
Before moving on to complex settings, it's best to rule out basic errors. Sometimes, simply rebooting both devices or forgetting the network on the receiving device is enough. However, if simple methods don't help, a more in-depth analysis of the access point configuration is required.
Frequency range limitations and compatibility
One of the most common reasons for connection failure is frequency band incompatibility. Modern smartphones, such as iPhone 13 or Samsung Galaxy S23, by default they create a network in the range 5 GHz to ensure high speed. However, older devices may not physically support this standard.
If the receiving phone is several years old, its module Wi-Fi It may only operate on the 2.4 GHz frequency. In this case, it simply "doesn't see" the network created by the new phone, or it sees it but refuses to connect. The solution lies in changing the access point settings on the transmitting device.
You need to go into the modem settings and forcefully switch the range to 2.4 GHzThis will reduce the maximum speed but ensure compatibility with older devices. It's also worth checking if "5 GHz Only" mode is enabled, which is sometimes activated automatically on systems with smart switching.
⚠️ Note: Switching to 2.4 GHz may increase interference if you're in an apartment building with many neighboring routers. In these conditions, speeds may be unstable.
Additionally, some telecom operators programmatically limit the ability to create access points in certain bands to save data. Checking your tariff plan in your operator account can help eliminate this factor.
IP address and DHCP server conflicts
The fundamental basis of any network connection is the correct operation of the protocol. DHCPIt is responsible for automatically assigning unique IP addresses to each connected device. If this process is disrupted, the phone will not be able to gain access to the network.
It often happens that the receiving device attempts to use a static IP address that is already taken or is inappropriate for the subnet of the access point being created. For example, the distributor operates on a subnet 192.168.43.x, and the client is configured to 192.168.1.xIn this case, the handshake will not take place.
To resolve this issue, find the desired network in the list of saved networks on the receiving phone, select "Forget Network" or "Delete," and then reconnect. This will force the device to request a new address from the DHCP server on the sending phone.
What is a static IP and why is it needed?
A static IP address is a permanent digital identifier for a device on a network. It's useful for setting up local servers or printers, but when connecting to other Wi-Fi networks (including phone hotspots), it often causes conflicts if it doesn't match the network range.
In rare cases, the issue may be on the handset itself. If many devices have connected to it previously, the address lease table may have become full. Restarting the access point will clear this cache.
Encryption and security issues
Connection security is ensured by encryption protocols such as WPA2 or newer WPA3If your new phone creates a WPA3-secured network and your old device doesn't support it, you won't be able to connect. Your device will constantly display "Connection Error" or "Unable to Obtain IP Address."
In the access point settings (Settings → Connections → Mobile Hotspot → Configuration) you should check the "Protection Type" parameter. It is recommended to set the value WPA2 PSK, as it is the most universal standard supported by almost all devices.
It's also worth paying attention to password complexity. Some older protocol implementations Wi-Fi may incorrectly process passwords with special characters or certain lengths. Try changing the password to a simple number combination to test your hypothesis.
| Parameter | WPA2 Personal | WPA3 Personal | Open network |
|---|---|---|---|
| Compatibility | High (99% of devices) | Medium (new devices) | Maximum |
| Security | High | Very high | Absent |
| Speed | Standard | Optimized | Depends on interference |
| Recommendation | Use as default | For new gadgets only | Not recommended |
Sometimes the problem lies in MAC filtering. If the sending phone has MAC address whitelisting or blacklisting enabled, the new device won't be allowed onto the network, even with the password.
Connected device limits
Mobile phone operating systems have artificial limits on the number of simultaneously connected clients. This is done to prevent the processor and radio module from overheating and the battery from draining within 15 minutes.
Usually Android allows you to connect from 5 to 10 devices, and iOS — up to 5. If you try to connect a sixth phone to the iPhone, it simply won't see the network or will be denied connection. Check the list of connected clients in the hotspot settings.
Additionally, some telecom operators may limit the number of concurrent sessions or traffic type (TTL) at the server level (CGNAT), which can lead to connection termination immediately after setup. In such cases, changing the TTL value in advanced settings or using root privileges can help.
⚠️ Warning: Extended Wi-Fi sharing with the maximum number of devices may cause your smartphone to overheat and your processor to throttle.
If you need to distribute the Internet to many devices, it is more practical to use a portable one Wi-Fi router with a SIM card, which has a more powerful antenna and cooling system.
The Impact of Power Saving and Sleep Mode
Aggressive power-saving algorithms in modern shells Android (MIUI, OneUI, ColorOS) may block hotspot functionality. The system may determine that the modem isn't being used efficiently and disable it or limit background data transfers.
You need to check the battery settings for the system app responsible for the hotspot. It's often hidden deep in the menu. You need to disable the "Power Saver" or "Limit Background Activity" option for the service. Hotspot or Wi-Fi Sharing.
There's also the issue of the Wi-Fi module "falling asleep." If the receiving phone has strict power saving mode enabled, it may disconnect as soon as the screen goes dark. In this case, you need to add the network to the exceptions list or disable Wi-Fi optimization.
☑️ Energy saving optimization
In some cases, enabling "Keep Wi-Fi on" in the advanced wireless settings can help. This will prevent the module from disabling when the screen is locked.
Failures in the operation of the radio module and drivers
Wi-Fi driver software failures are common. The communication module may become stuck in a waiting state or incorrectly process association requests. This often occurs after updating the operating system or installing beta software.
The most effective solution is to reset network settings. This won't delete your personal photos or contacts, but it will clear all saved Wi-Fi passwords, Bluetooth settings, and mobile network settings. The path to this function is usually in Settings → System → Reset → Reset network settings.
If the problem persists even after a reset, there may be a hardware fault with the antenna module. This often happens after the phone has been dropped or exposed to water. In this case, software solutions will be useless, and diagnostics at a service center will be required.
It is also worth mentioning the conflict of protocol versions DNSSometimes the phone connects to the network, but the pages don't load. In this case, manually entering DNS servers (for example, Google's) helps. 8.8.8.8) in the IP settings of the receiving device.
Frequently Asked Questions (FAQ)
Why does my phone say "Connected, no internet access"?
This means a physical connection has been established between the devices, but the sending phone isn't transmitting data from the mobile operator. Check that mobile data is enabled on the primary device, that there's a balance, and that your antivirus isn't blocking the connection.
Is it possible to share Wi-Fi if the phone is connected to a Wi-Fi router?
Most smartphones can't simultaneously receive and broadcast a Wi-Fi signal on the same frequency. Typically, when a Wi-Fi hotspot is enabled, the receiver is disabled. However, some flagship models support a Wi-Fi Repeater feature, which allows the received signal to be broadcast further.
Why can't my laptop see the access point from my phone?
Most likely, your laptop doesn't support the 5 GHz frequency your phone uses, or your network card driver is outdated. Try switching your access point to 2.4 GHz mode or updating your computer's Wi-Fi adapter drivers.
Does a low battery affect the operation of the access point?
Yes, when the battery level drops below 15-20%, many phones automatically disable the hotspot or reduce the signal strength to save power. For stable performance, it's recommended to keep your phone charging while tethering.