Many people are familiar with the situation when they urgently need access to the global network, but their wired provider or home router has failed. In such moments, a smartphone becomes a lifeline, allowing you to create mobile hotspot to connect other devices. However, users often encounter a situation where the laptop simply doesn't see the created hotspot or refuses to connect to it, displaying the endless message "Obtaining IP address."
There could be many reasons for this behavior, from a simple network driver glitch to frequency band incompatibility. Modern operating systems Android And iOS They are constantly updated, changing the operating logic of network modules, which sometimes leads to conflicts with older adapters in laptops. Understanding the fundamental principles of wireless networks helps to quickly diagnose the problem and restore the connection.
In this article, we'll take a detailed look at the technical aspects that prevent your device from connecting online via your phone. We'll cover frequency settings, power-saving features, and hidden parameters that even experienced users often overlook. The main cause of problems in 80% of cases is a mismatch between the 2.4 GHz and 5 GHz bands between the phone and the laptop's network card. Let's look at everything in order.
The main reasons for frequency range incompatibility
The first thing modern smartphone users encounter when trying to share the internet is the problem of frequency bands. By default, many new phones, especially models based on Android 10 and above, as well as fresh ones iPhone, create an access point in the range 5 GHzThis is done to ensure high data transfer speeds and less airtime congestion.
However, many laptops, especially those manufactured more than 3-4 years ago, are equipped with Wi-Fi adapters that are physically incapable of working with the 5 GHz frequency. They only see the 2.4 GHz band. When your phone broadcasts exclusively at the higher frequency, an older laptop simply "misses" it, as the signal simply doesn't exist for it.
- 📡 2.4 GHz band: It has a lower speed but a longer range and is compatible with almost every device that has ever had Wi-Fi.
- ⚡ 5 GHz band: provides high speed and stability, but has a shorter range and requires support from the receiving device.
- 🔄 Automatic selection: Some phones try to detect the laptop's capabilities themselves, but this mechanism often fails.
To fix the situation, you need to manually switch the range in the access point settings. Android This is usually found in the menu "Wi-Fi Hotspot" -> "Configure" -> "Band". Select the "2.4 GHz" or "Maximum Compatibility" option. iPhone This option is called "Maximum Compatibility" and also switches the network to 2.4 GHz.
⚠️ Attention: Switching to 2.4 GHz may reduce internet speed, but connection stability with older laptops is guaranteed to improve. Don't forget to save your settings.
It's also worth keeping in mind that in some regions or with some carriers, the 5 GHz band may be software-restricted. If you're roaming or using a corporate SIM card, check your plan's terms, as your carrier may block data sharing or limit available frequencies.
Problems with laptop drivers and network adapters
If your phone is broadcasting the network, but your laptop can't see it or connect, the problem often lies in the computer's software. Wi-Fi module drivers are the intermediaries between the operating system and the hardware. If they are outdated, damaged, or malfunctioning, the adapter may behave unpredictably.
Users often forget that the network adapter could simply be frozen in the background. Simply reconnecting doesn't always help. A full network stack reset or driver reinstallation is necessary. This is especially true for Windows 10 and 11, where automatic updates sometimes install generic drivers that don't take into account the specifics of a particular module.
To diagnose the adapter's status, you can use the Device Manager. Find the "Network Adapters" section, select your Wi-Fi module (usually the name contains the words Wireless, 802.11 or a brand like Intel, Realtek, Qualcomm) and try updating the driver or rolling back if the problem appeared after a recent system update.
In some cases, a forced reinstallation of the device can help. Remove the driver from Device Manager and click "Scan for hardware changes." The system will attempt to find and reinstall the default driver, which often resolves software conflicts.
IP addressing errors and DNS conflicts
One of the most annoying issues is the "Obtaining IP address" status, which hangs indefinitely. This means there's a physical connection, but the logical network setup isn't happening. The phone, acting as a router, should assign a unique IP address to the laptop via the protocol. DHCPIf this process is blocked, there will be no internet.
The problem may be caused by a static IP address previously entered in the laptop's network settings for your home Wi-Fi network. When you try to connect to your phone, the laptop continues to connect with the old settings, which are incompatible with the new access point. You need to check that the protocol properties are correct. IPv4 There was automatic address acquisition.
DNS servers can also conflict. If your phone's ISP provides one DNS server, but your laptop has a hardcoded DNS server (for example, a corporate or blocked one), domain name resolution won't work. The website won't open, even though you're technically connected.
| Parameter | Recommended value | Where to check |
|---|---|---|
| IP address | Receive automatically | IPv4 Properties |
| DNS server | Receive automatically (or 8.8.8.8) | IPv4 Properties |
| Default Gateway | Automatically (phone address) | IPv4 Properties |
| Network prefix | 255.255.255.0 | Additional options |
Try registering public DNS servers from Google (8.8.8.8 And 8.8.4.4) or Cloudflare (1.1.1.1). This often solves the problem when pages take a long time to load or don't open at all, despite the presence of the Wi-Fi icon.
Power saving settings and airplane mode
Modern laptops and smartphones aggressively conserve battery power. Sometimes Windows or macOS decides that the Wi-Fi adapter is consuming too much power and forcibly disables it or puts it into sleep mode immediately after attempting to connect. This appears as a sudden connection loss.
In Windows, you can disable this feature in Device Manager. In the Wi-Fi adapter properties, go to the "Power Management" tab and uncheck "Allow the computer to turn off this device to save power." This will prevent unexpected shutdowns.
The phone also has its limitations. If the smartphone's battery charge drops below 15-20%, the system Android or iOS may automatically disable the hotspot to preserve the ability to make emergency calls. Additionally, enabling "Data Saver" or "Ultra Data Saver" mode can block background data transfers for connected devices.
- 🔋 Airplane mode: Sometimes it helps to briefly turn on and off airplane mode on both devices to reboot the radio modules.
- 📉 Battery saving: Disable power saving while sharing the Internet, as this process heats up the phone a lot.
- 🌙 Sleep mode: Make sure your laptop doesn't go to sleep when you close the lid if you plan to download files.
⚠️ Attention: Sharing Wi-Fi is a power-intensive process. Your phone can become very hot. If the device overheats, it will forcibly disable the Wi-Fi module to protect its components.
Restrictions from the mobile operator
Restrictions imposed by mobile operators also shouldn't be ignored. Many tariff plans, especially unlimited ones, have hidden or explicit restrictions on tethering. The operator can determine that the traffic is coming from a laptop rather than a phone based on the value. TTL (Time To Live) in data packages.
By default, the TTL is 128 in Windows and 64 in Android. When you share the internet, the TTL is decremented by 1. The carrier sees packets arriving with a TTL of 63 (if sharing on Android) or 127 (if sharing on iPhone), understands that sharing is occurring, and either blocks the connection or starts charging additional fees.
Bypassing this limitation on Android often requires root access and modifying a system file. build.prop Or use special apps that change the TTL at the kernel level. On a non-jailbroken iPhone, changing the TTL using standard tools is impossible, but enabling "Maximum Compatibility" mode can sometimes help, as some carriers filter traffic more loosely in 2.4 GHz mode.
How do I know if an operator is blocking distribution?
Try connecting your laptop and opening the operator's website or any other heavy resource. If you have internet access on your phone, but the pages don't load on your laptop, or you're redirected to a page asking you to pay for the service, the block is active.
It's worth noting that tariff terms are subject to change. If data sharing was previously working but then stopped without changing the settings, it's likely that the operator has changed the terms of service. Check your operator's personal account or app.
Diagnosing and resetting network settings
If none of the above methods help, the only option left is a full network reset. This will reset all network settings (Wi-Fi, Bluetooth, mobile data) to factory defaults. This is safe for your data (photos, contacts), but you'll have to re-enter passwords for all Wi-Fi networks.
On Android the path usually looks like this: Settings → System → Reset settings → Reset network, Wi-Fi, and mobile data settingsOn . iPhone: Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings.
On a Windows 10/11 laptop, there's also a network reset feature. It's located at: Settings → Network & Internet → Advanced network settings → Network resetAfter this, the computer will restart, and all network adapters will be reinstalled completely.
☑️ Diagnostic checklist
After performing a reset, it is recommended to re-create the access point on the phone, setting a new network name and a complex password using encryption WPA2-Personal (or WPA3, if the devices support it). It's best to delete old connection profiles on your laptop before trying again.
Alternative connection methods: USB and Bluetooth
If your Wi-Fi still isn't working, don't despair. There are alternative ways to share your internet connection, which are often more stable and faster. The first and best option is connecting via a USB cable. This not only shares your internet connection, but also charges your phone and ensures minimal latency (ping).
To do this, connect your phone to your laptop using a cable. On Android, go to your hotspot settings and enable "USB tethering." On your iPhone, install iTunes (for drivers) and enable "Personal Hotspot" in your cellular settings. On your computer, select the connected device as your network connection.
The second option is Bluetooth. It's slower than Wi-Fi, but uses less power and sometimes works in areas where Wi-Fi is blocked. Pair the devices, then select "Bluetooth tethering" in the hotspot settings on your phone. On your laptop, add the device and select "Use network access" in the Bluetooth connection properties.
Using a USB cable also allows you to bypass some carrier restrictions, as traffic in USB modem mode is sometimes identified differently than a Wi-Fi hotspot. Furthermore, a cable connection is protected from data interception by neighbors, which is important when working with confidential information in public places.
Why does my laptop see the network, but it says "Unable to connect"?
Most often, this is an issue with the encryption type or saved profile. Try changing the security type on your phone from WPA3 to WPA2. Also, on your laptop, find your network in the network management app, tap "Forget," and try connecting again with the password. The error can occur due to an incorrectly entered password, even if you're sure it's correct (check your keyboard layout and capitalization).
Can antivirus software block Wi-Fi hotspots?
Yes, some aggressive firewall settings in antivirus software (Kaspersky, ESET, Avast) can block incoming connections from other devices, considering the network being created public and unsafe. Try temporarily disabling your antivirus's firewall or adding the network being created to the trusted list.
Does the number of connected devices affect the speed?
Absolutely. The connection bandwidth is shared between all connected clients. If your access point has three or four devices actively downloading updates or watching videos, the laptop's speed may drop to a crawl. Furthermore, the phone's processor may not be able to encrypt traffic for multiple clients simultaneously.