Your iPhone 12 Pro Has your Wi-Fi connection suddenly stopped working, even though it was working perfectly before? This problem is familiar to many owners of devices on iOS 15–17, and there could be more than a dozen reasons for it - from banal failures in the settings to hardware malfunctions of the module Wi-Fi/Bluetooth. Unlike newer models (iPhone 13/14), where such errors are often corrected automatically, Episode 12 requires manual intervention in 70% of cases.
In this article we will look at all possible reasons, Why iPhone 12 Pro does not distribute Wi-Fi - from the obvious (for example, turned off Modem mode) to hidden ones (for example, a conflict with an update iOS 17.4). You will receive unique diagnostic instructions, which you won't find in standard Apple guides, including a level check network protocols and system log analysis. We'll also reveal little-known nuances of the system's operation. Broadcom BCM4375 chip, responsible for wireless communications in iPhone 12 Pro, and we'll explain why its overheating can block Internet distribution.
If you've already tried restarting your phone or resetting network settings, don't stop there. In 3 out of 5 cases, the problem lies deeper and can be resolved without a trip to a service center. Let's start with the simplest steps and gradually work our way up to more complex technical solutions.
1. Check basic settings: what could have turned off on its own?
Before blaming hardware failure, make sure the problem isn't in basic settings. iOS 15–17 parameters Modem mode may reset after updates or when connecting to new networks. Here's what to check first:
- 📶 Is modem mode enabled? Go to
Settings → Tetheringand make sure the slider is active. If it's not, the feature is disabled at the operator level (more on that below). - 🔄 The password hasn't changed? Sometimes after a network reset iPhone Generates a new password for the access point. Check it in the same menu.
Tethering → Wi-Fi Password. - 📵 Is Airplane Mode turned off? Even if the indicator does not light, double-check
Control center(swipe down from the top right corner) or inSettings → Airplane Mode. - 📱 Is mobile data active? Without connection to 3G/4G/5G There's simply nothing to share. Make sure there's a network indicator in the status bar (e.g.
5GorLTE).
If everything is included, but iPhone 12 Pro Still not distributing Wi-Fi, proceed to the next step. Please note: in some regions operators are blocking Modem mode by default (for example Tele2 or Yota). In this case, you will have to call support and activate the option.
2. Network reset and reboot: why it works 60% of the time
The most effective way to fix software glitches is reset network settingsThis procedure deletes all saved Wi-Fi networks, VPN, And mobile internet settings, returning them to factory settings. iPhone 12 Pro A network configuration error is one of the main reasons why Wi-Fi isn't working.
How to reset:
- Open
Settings → General → Transfer or reset iPhone. - Select
Reset → Reset network settings. - Enter your password (if required) and confirm the action.
After reset iPhone It will reboot. Don't worry if you lose your connection to your home Wi-Fi after this—you'll have to set it up again. Important: if you used static IP or DNS (for example, for AdGuard), they will also need to be reconfigured.
Enable mobile data|Check 4G/5G functionality|Start Tethering|Connect to a hotspot from another device|Update firmware (if available)
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If resetting doesn't help, try forced reboot (it clears RAM and restarts system processes):
- Quickly press and release the button increase volume.
- Quickly press and release the button decrease volume.
- Press and hold the side button (on the right) until the logo appears Apple.
3. iOS Problems: Bugs, Updates, and Conflicts
iPhone 12 Pro particularly sensitive to updates iOS, and some versions have critical bugs related to Modem modeFor example, in iOS 17.2–17.3 There was a bug that caused the access point to turn off after 5-10 minutes of operation. iOS 16.4 Many users complained about the inability to connect devices to the distributed network.
Here's what you can do:
- 🔄 Update iOS to the latest version:
Settings → General → Software UpdateEven if the system says there are no updates, check manually—sometimes they don't appear automatically. - 📉 Rollback to a previous version (if the problem appeared after the update). For this you will need a computer with iTunes (Windows) or Finder (Mac) and firmware files (IPSW). Attention: Apple regularly closes the rollback option, so this method does not always work.
- 🛠️ Reset all settings (does not delete data, but returns all parameters to factory settings):
Settings → General → Transfer or reset iPhone → Reset.
If the problem appeared after updating to iOS 17.4+, check privacy settingsIn new versions, Apple has tightened control over application permissions, and some programs (for example, VPN clients or antiviruses) can block Internet distribution.
How to check if a VPN is blocking Wi-Fi hotspots?
Open Settings → VPN and device management and temporarily disable all VPN profiles. If after this Modem mode It worked—the problem is in the VPN settings. Try deleting and re-adding the profile or changing your service provider (for example, from NordVPN on ProtonVPN).
Another little-known bug - SIM card conflictIf you have recently changed your operator or activated eSIM, try:
- Remove the physical SIM card and leave only the eSIM (or vice versa).
- Reboot iPhone.
- Check the work
Modem mode.
4. Hardware failures: when a hardware failure is to blame
If software methods do not help, the problem may lie in hardware. IN iPhone 12 Pro The chip is responsible for wireless communication Broadcom BCM4375, which may fail over time due to:
- 🔥 Overheating (especially if the phone was often used to distribute the Internet in hot conditions).
- 💧 Moisture ingress (Even if the moisture indicator did not work, corrosion could have damaged the contacts).
- 🛠️ Poor quality repairs (for example, after replacing the battery or screen).
How to check hardware health:
- Antenna test: Call the phone and check the connection quality. If the connection is interrupted or the sound is distorted, there is a problem with the module. Wi-Fi/Bluetooth.
- Diagnostics through Apple Diagnostics (only at the service center). You can use applications like Network Analyzer (free in App Store) to check the signal strength.
- Checking the heating: run
Modem modeand after 5-10 minutes touch the top part iPhone (where the antenna is located). If it's hot, the chip is overheating.
If you suspect a hardware failure, Do not try to disassemble the phone yourself. - V iPhone 12 Pro Antenna cables are extremely fragile and easily damaged. Contact a service center, but first check if your warranty is still valid (even if it is, Apple sometimes offers assistance if it confirms a manufacturing defect).
5. Conflicts with the operator: blocking and restrictions
Many operators (especially MTS, Beeline, Megaphone) by default limit or completely block Modem mode On some plans. This is done to prevent users from "sharing" traffic to other devices, thereby saving on mobile data. Moreover, blocking can occur even if everything worked before—for example, after changing your plan or activating a new SIM card.
How to check and fix the blockage:
- Call the operator (support numbers: MTS —
0890, Beeline —0611, Megaphone —0500, Tele2 —611) and check whether it is allowedModem modeon your tariff. - If the blocking is confirmed, activate the option (sometimes it is free, sometimes it requires connecting an additional package).
- Check it out APN settings: go to
Settings → Cellular → Data Options → Cellular Data Networkand make sure the fieldsAPN,UsernameAndPasswordfilled in correctly (they can be verified on the operator’s website).
| Operator | APN for Tethering | Is activation required? |
|---|---|---|
| MTS | internet.mts.ru |
Yes (free) |
| Beeline | internet.beeline.ru |
Yes (sometimes a paid option) |
| Megaphone | internet |
No (allowed by default) |
| Tele2 | internet.tele2.ru |
Yes (requires a call to support) |
| Yota | yota.ru |
No, but it can be blocked |
If the operator claims that there are no blockages, but Modem mode still not working, try inserting a SIM card from a different operator (for example, Megaphone, where tethering is enabled by default). If everything works with a different SIM card, the problem is definitely with your provider.
6. Alternative ways to distribute the Internet if Wi-Fi doesn't work
If none of the methods helped, and iPhone 12 Pro If your Wi-Fi still isn't working, you can try alternative connection methods. They're less convenient, but they can sometimes help:
- 🔌 USB cable: connect iPhone to a computer or laptop via Lightning-cable. In
Settings → Tetheringan item should appearUSB connectionThis method works even if Wi-Fi and Bluetooth are disabled. - 🔵 Bluetooth: turn on Bluetooth on both devices and connect to iPhone It's like a modem. The speed will be slower than Wi-Fi, but it's sufficient for messaging and email.
- 📶 External router: if you have 4G router (For example, Huawei E5577 or TP-Link M7350), insert a SIM card into it and share the internet through it. It will be cheaper than repairing it. iPhone.
To connect via USB on Windows You may need to install a driver Apple Mobile Device Support (download from the official website) Apple). On Mac everything should work out of the box.
If you frequently encounter problems with Wi-Fi distribution, consider purchasing portable router. Modern models (for example, GlocalMe U3) support 5G, have a built-in battery and allow you to connect up to 10 devices simultaneously - this is more reliable than relying on Modem mode V iPhone.
7. Diagnostics via system logs: for advanced users
If you are ready to dive deeper, you can analyze system logs iPhoneto identify the cause of the failure. To do this, you will need a computer with the program installed. Console (For Mac) or iMazing (For Windows/Mac).
Instructions for Mac:
- Connect iPhone to the computer via USB.
- Open the program Console (located in
Programs → Utilities). - In the left menu, select yours iPhone.
- In the search bar, enter
WiFiorHotspot. - Try turning it on
Modem modeand see what errors appear in the logs.
Common mistakes to look out for:
Could not start hotspot: error -67053- problem with SIM card or operator.WiFi driver failed to start- failure Wi-Fi drivers (possibly a hardware failure).Entitlement missing for tethering— the operator blocks the distribution.
If you find a critical error in the logs, copy its text and search for a solution on forums (for example, Apple Support Communities or Reddit). Often similar problems have already been solved by other users.
FAQ: Frequently asked questions about Wi-Fi hotspot sharing on iPhone 12 Pro
🔍 Why does my iPhone 12 Pro share Wi-Fi, but the internet isn't working?
This is a typical problem where an access point is created, but traffic is not transmitted. Causes:
- The operator blocks data transmission in
Modem mode(you need to call support). - Incorrect APN settings (check them in
Settings → Cellular → Cellular Data Network). - Glitch in DNS (try manually entering Google's DNS:
8.8.8.8And8.8.4.4).
Also try disabling VPN And Content filtering in the settings iPhone.
📱 Is it possible to share Wi-Fi from an iPhone 12 Pro to multiple devices at once?
Yes, iPhone 12 Pro supports connection up to 5 devices simultaneously (depending on the iOS version). However, the speed will be divided among all connected devices. If your internet connection has slowed down, try:
- Disable unnecessary devices.
- Switch to 5 GHz (if your iPhone and client devices support this range).
- Limit background activity on connected devices (for example, disable automatic app updates).
🔋 Why does my iPhone 12 Pro battery drain quickly when using Wi-Fi?
Internet distribution is one of the most energy-consuming functions iPhone. IN iPhone 12 Pro the chip is responsible for this Broadcom BCM4375, which, when actively working, consumes up to 1.5–2 W (versus 0.3 W in standby mode). To reduce battery consumption:
- Connect iPhone to charge during distribution.
- Turn it off Bluetooth And Geolocation, if they are not needed.
- Reduce screen brightness and turn on
Low power mode. - Use USB distribution instead of Wi-Fi - it is less power hungry.
If the battery is draining too quickly (for example, 1% per minute), it may indicate battery wear - check its condition in Settings → Battery → Battery Health.
🔄 What should I do if my iPhone 12 Pro is sharing Wi-Fi, but my devices won't connect?
If the access point is visible, but gadgets cannot connect to it, try:
- Change password to a simpler one (for example,
12345678) and try to connect again. - Disable MAC filtering on the connected device (if it is enabled).
- Reboot both devices (iPhone and client).
- Check if it is enabled on the client device VPN or Firewall, blocking the connection.
If the problem persists, try creating an access point on a different Wi-Fi channel (manually select the channel 6 or 11 in the router settings, if iPhone allows you to do this).
🛠️ How much does it cost to repair the Wi-Fi module on an iPhone 12 Pro?
The cost of repair depends on the cause of the malfunction:
- Replacing the antenna cable: 1,500–3,000 ₽ (if the problem is in the contacts).
- Replacing Wi-Fi chip (Broadcom BCM4375): 5,000–8,000 ₽ (requires soldering).
- Diagnostics at a service center: 500–1,500 ₽ (sometimes free if you do the repairs there).
In official services Apple The repair will cost more (from 10,000 ₽), but they provide a warranty. Before repairing, check if your iPhone extended warranty (for example, under the program AppleCare+).