You turned on modem mode on your own iPhone, connected a second iPhone to the shared network—and after a few minutes, the connection drops. Moreover, the problem occurs even when both devices are fully charged and the cellular signal is stable. What's going on? Why? iOS suddenly interrupts the distribution Wi-Fi, although everything seems correct in the settings?
This problem is familiar to many users. Apple, especially after system updates or when using certain models (eg, iPhone 12/13 With iOS 16+). In 80% of cases, the culprit is not hardware failure, but software limitations or conflicting settings. We analyzed 7 Key Reasons, through which the Internet is distributed iPhone on iPhone spontaneously switches off - from the banal auto-off when idle to hidden bugs in the protocol Wi-Fi Direct.
In this article you will find not only diagnostics, but also step-by-step solutions for each situation - taking into account the specifics of different versions iOS and models iPhoneIf the problem is deeper, we'll show you how to collect an error log to contact support. Apple.
1. Automatic power-saving shutdown
The most common reason is - Automatic modem disconnection function, which is activated when idle. By default iOS breaks the distribution Wi-Fi After 90 seconds, if there are no active devices connected to the network or there is no data transfer. This is designed to conserve battery life, but it often works too aggressively.
The problem is exacerbated on devices with iOS 15+, where energy saving algorithms have become “smarter”: the system can turn off the modem even with minimal activity (for example, if the second iPhone It just maintains the connection but doesn't download data). This is especially noticeable on models iPhone SE (2nd generation) And iPhone XR due to their less powerful chips.
- ⚡ How to check: Go to
Settings → Tetheringand see if there is an “Auto power off” item there (on some firmware versions it is hidden). - ⏳ Test: Connect the second one iPhone to the distribution and run a continuous ping on it (for example, through the application Network Analyzer). If the distribution doesn't turn off, the problem is precisely inaction.
- 🔋 Exception: On iPhone 14 Pro and newer with iOS 17 The energy saving logic is different - the modem can only turn off when the battery level drops below 20%.
⚠️ Attention: On some mobile operator tariffs (for example, MTS or Beeline) Internet tethering is automatically blocked after 10-15 minutes due to ISP restrictions. This is not a bug. iPhone, but a tariff plan feature. Check the details in your operator account.
Go to Settings → Tethering
Click on "Tethering" (top item)
Turn on the "Allow others" switch (if it is off)
Turn off the "Auto-Off" option (if it is available in your iOS version)
Restart both iPhones-->
2. Conflict with cellular network settings
If your iPhone connected to the network 4G/5G, but distribution Wi-Fi It breaks periodically, it could be the fault of Incorrect APN parameters or operator restrictions. For example, Tele2 And Yota Sometimes, traffic distribution is blocked on unlimited internet plans if the device is left in modem mode for a long time.
Another common problem is switching between networks. When iPhone moves from 5G on 4G (or vice versa), the distribution connection may be reset. This is especially true for models iPhone 12/13 with module Qualcomm X60, where network switching algorithms are not always stable.
| Symptom | Possible cause | Solution |
|---|---|---|
| Data distribution is disabled when switching from 5G to 4G | Unstable operator coverage | Manually fix the network in Settings → Cellular → Data Options → Voice & Data |
| The distribution only works for 5-10 minutes | Operator time limit | Check your tariff in your personal account or call support |
| The connection is dropped when calling | Conflict between voice communication and modem | Activate Wi-Fi Calling in the settings |
To rule out network problems:
- Check if your plan supports internet tethering (sometimes this is a separate option).
- Reset network settings:
Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings. - If you use eSIM, try switching to a physical SIM card - some operators do not work well with virtual cards in modem mode.
MTS
Beeline
Megaphone
Tele2
Yota
Other-->
3. Software bugs in iOS (especially after updates)
After the release iOS 16.4 And iOS 17.0 Many users encountered a bug in which the distribution Wi-Fi It shuts down after 30-60 seconds, regardless of activity. The problem is related to a module error. com.apple.networking, which is responsible for managing network connections.
How to recognize a bug:
- 🐞 Distribution is disabled at exactly the same intervals (for example, always after 40 seconds).
- 🔄 The problem appears immediately after the update iOS.
- 📱 On the second screen iPhone The "Internet connection lost" notification appears, although the modem on the first device is still turned on.
Solutions:
- Rollback to a previous version iOS: If the bug appeared after the update, you can try to return the old firmware via iTunes (but this will reset all data!).
- Reset network settings:
Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings. - Installing the beta version iOS: Apple often fixes such bugs in subsequent updates. Sign up for beta testing via official website.
⚠️ Attention: If you use iPhone with jailbreak, the problem may be in tweaks that modify network functions (for example, Liberty Lite or NetworkList). Try disabling all tweaks through iCleaner Pro.
How to collect error logs for Apple
1. Connect your iPhone to a Mac or PC with Xcode.
2. Launch Console.app (Applications → Utilities → Console).
3. Turn on modem mode and wait until the connection is disconnected.
4. In the console, filter the logs by keyword PersonalHotspot or WiFiSharing.
5. Save the log to a file and send it to support. Apple through the website getsupport.apple.com.
4. Problems with the Wi-Fi chip or antenna
If distribution Wi-Fi turns off even after resetting the settings and checking the software parameters, it is possible hardware failure. Most often, the culprits are:
- 📡 Damaged Wi-Fi antenna: For example, after a fall or exposure to moisture (even if iPhone did not sink, corrosion could damage the contacts).
- 🔌 Faulty Wi-Fi/Bluetooth module: In models iPhone 11 And iPhone 12 This is a separate chip that can fail due to overheating.
- 🔋 Worn out battery: When the discharge is below 30% iOS begins to aggressively save energy, including turning off the distribution.
How to diagnose:
- Check if it works Wi-Fi in normal mode (connected to the router). If not, the problem is definitely with the module.
- Run diagnostics through the hidden menu: type in your phone
#0and click "Call". In the menu that appears, selectWi-Fi(If the menu does not open, your operator has blocked it). - Check to see if it is overheating iPhone in the area of the upper antenna (next to the camera) during distribution.
If you suspect a hardware failure:
- 🛠️ Contact the service center Apple for diagnostics (free of charge if the device is under warranty).
- 🔍 Check it out battery status V
Settings → Battery → Battery HealthIf the capacity is below 80%, replace the battery. - 📱 Try distributing the Internet via Bluetooth or USB - If these methods work stably, the problem is definitely in Wi-Fi module.
5. Conflict with VPN or firewall
If on yours iPhone installed VPN application (For example, ProtonVPN, NordVPN) or activated ad blocker (like 1Blocker), they can interfere with internet distribution. Some VPNs intercept all traffic, including that which goes through modem mode, and if there is a connection error, the distribution is interrupted.
The problem may also be in firewall settings (if you use iPhone with jailbreak or corporate security policy). For example, a profile MDM (Mobile Device Management) may block distribution Wi-Fi as an "insecure" connection.
How to check:
- Disable VPN in settings:
Settings → VPNand deactivate the connection. - Remove all installed certificates:
Settings → General → VPN and device management → Certificates. - Check if the profile is installed MDM:
Settings → General → VPN and device managementIf there is, delete it (you may need an administrator password).
⚠️ Attention: Some banking apps (eg. Sberbank Online or Tinkoff) install their own security certificates, which can interfere with internet tethering. Try temporarily removing such applications for testing.
6. Limitations on the number of connected devices
By default iPhone allows you to connect up to 5 devices simultaneously. However, on some firmware (especially iOS 15.5–16.1) this limit can be reset, and the system begins to “lose” connected gadgets, disconnecting them after a few minutes.
The problem may also be in IP address conflict: if the second iPhone trying to get the same IP, which is already occupied by another device (for example, MacBook or iPad), the distribution will be interrupted. This often happens if your iPhone other devices were connected, and their IP did not reset.
How to fix:
- 🔄 Reset network settings:
Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings. - 📱 Limit the number of devices: Disconnect all unnecessary gadgets from distribution, leave only the necessary ones iPhone.
- 🔧 Change IP range: Manually set a different address pool (for example,
192.168.44.xinstead of192.168.43.x), but this requires jailbreak.
7. Hidden carrier settings (Carrier Settings)
Apple regularly updates operator settings (Carrier Settings) are small files that determine how iPhone interacts with the mobile provider's network. Sometimes these updates contain errors that prevent the distribution Wi-Fi does not work correctly.
For example, after the update Carrier Settings 50.0 (released in March 2023) many users MTS And Beeline We encountered a problem where the distribution would disconnect after 2-3 minutes. The problem was only resolved in the next update.
How to update or reset your carrier settings:
- Check the current version:
Settings → General → About → Network. - If an update is available, install it:
Settings → General → Software Update(Sometimes Carrier Settings are updated separately from iOS). - Reset network settings (as described above) to return your carrier settings to factory defaults.
If the problem appeared immediately after the update Carrier Settings, you can try to roll back:
- Connect iPhone To Mac or PC With iTunes.
- Make a backup.
- Restore firmware via iTunes (don't update, just restore) by selecting the file IPSW without the last ones Carrier Settings.
FAQ: Frequently asked questions about sharing Wi-Fi from iPhone to iPhone
❓ Why does Wi-Fi hotspot only work for 5 minutes and then turn off?
Most likely it works auto power off when idle (cm. Section 1). Also check if your operator limits the distribution time (for example, Tele2 on some tariffs the modem is blocked after 10 minutes).
❓ Is it possible to make sure that Wi-Fi hotspots never turn off?
You can't completely disable the timeout, but you can increase the idle time:
- Connect a device to the distribution that will constantly send packets (for example, Raspberry Pi with ping script).
- Use USB distribution instead of Wi-Fi - it's more stable.
- On iOS 17+ Activate the "Low Power" mode for your modem (but this may reduce speed).
❓ Why doesn't the second iPhone see the hotspot network?
Check:
- 🔍 On the first iPhone Is the "For everyone" mode enabled in
Settings → Personal Hotspot → Allow Others. - 📶 Does the network name (SSID) conflict with other devices (for example, if you have a router with the same name at home).
- 🔄 Restart both devices—sometimes resetting the network connection cache helps.
❓ Sharing works, but the internet is very slow. What's wrong?
Reasons:
- 📶 Weak cellular network signal (check the number of “bars” on the first iPhone).
- 🔄 On the first device, background updates or downloads are enabled (for example, App Store or iCloud).
- 🛠️ On the second iPhone A VPN or ad blocker is running and slowing down traffic.
Solution: Disable all background processes on both devices and check the speed via Speedtest.
❓ Is it possible to share Wi-Fi from iPhone to iPhone without data limits?
It depends on your tariff:
- 📵 Most operators (eg. MTS, Beeline) limit distribution even on “unlimited” tariffs (usually 10–30 GB per month).
- 🌐 Some providers (like Yota) allow unlimited distribution, but may throttle the speed once the limit is exceeded.
- 💳 Check the terms in your personal account or contact support—sometimes unlimited distribution is available as a paid option.