A situation where one smartphone iOS The need to provide access to the global network to another is common. This could be a work situation when the corporate router is unavailable, or a vacation in nature where the only connection is a mobile operator. In an ecosystem environment Apple This process is simplified as much as possible thanks to technology Personal Hotspot, known in Russia as "Modem Mode." However, despite its apparent simplicity, users often encounter nuances that prevent instant connection.
The main task is to properly configure the donor device that will broadcast the signal. It is important to understand that in this scenario, one iPhone acts as a full-fledged access point, replacing Wi-Fi routerIt takes mobile internet (3G, 4G, or 5G) and converts it into a wireless signal using the 802.11 standard. The second device receiving the signal simply needs to find this network in the list of available connections. The speed and stability of this connection directly depend on the quality of cellular coverage and security settings.
In this article, we'll detail the steps for both devices. We'll cover not only the standard steps but also hidden settings that can affect data transfer speeds. We'll pay special attention to security, as an open network can become a backdoor for malicious actors to intercept traffic. We'll also touch on frequency compatibility, as not all older devices support modern broadcast bands.
Activating tethering mode on the donor device
The first and most important step is to prepare it iPhone, which will be tethering. Without proper configuration at this stage, all further actions will be useless. You need to ensure that the SIM card has data service enabled and has available traffic. Carriers often block tethering on unlimited data plans, so checking tariff conditions is a critical preliminary action.
To enable the feature, go to the main settings menu. You will need the section Cellular communications or Mobile data, depending on the localization version iOSWithin this menu is the "Modem Mode" option. If you see it right away, click it. If you don't see it, it may be hidden in the deeper layers menu, or your carrier may not have provided a settings profile automatically.
Inside the activation menu, you'll see a switch labeled "Allow others." It needs to be toggled to the on position. After enabling iOS will generate a password for connection. By default, it's quite complex, which is good for security, but difficult to enter quickly. You can change it to a simpler one if you plan to connect the same devices frequently.
⚠️ Note: When activating tethering mode, the donor device begins to actively consume battery power. It is recommended to connect it to a power source or power bank if planning a long session.
It is worth noting that modern models iPhone use improved encryption algorithms. When you enable tethering, the system creates a secure tunnel. If you use dual-band mode, you can select the 5 GHz frequency, which will provide higher speed but a shorter signal range compared to the 2.4 GHz standard.
The process of connecting a second iPhone to the network
Once the access point is activated, you can proceed to configuring the receiving device. The procedure here is standard for any Wi-Fi network, but has its own unique ecosystem features. Apple. Open the application Settings on the second iPhone and select a section Wi-FiMake sure the wireless networks slider is turned on.
In the list of available networks, you should see the name of the donor device. By default, this is the phone model name, for example, "user's iPhone." If there are many devices and you don't see the one you need, try moving closer. The range of a mobile hotspot is usually shorter than that of a desktop router, about 10-15 meters in open space.
Tap the network name. The system will prompt you for a password. Enter the password set on the first phone. If the information is correct, a check mark will appear next to the network name, and an icon of two interlocking rings will appear in the status bar, indicating an active tethering connection. The second device's traffic is now routed through the first device's SIM card.
☑️ Checklist for a successful connection
Agree to have the device remember your settings and connect automatically in the future. This is especially convenient if you regularly use the same device. iPhone as a hotspot for a tablet or laptop.
Using the ecosystem and Family Sharing
Owners of multiple devices Apple, using the same Apple ID, can use a simplified connection diagram. If both iPhone If you're logged in under a single account, the password entry process can be completely eliminated. This is possible thanks to iCloud's instant access key syncing technology.
When you enable Personal Hotspot on one device, other devices within range using the same Apple ID will see it in the list of networks with a special icon. When attempting to connect, the system won't ask for a password; it will simply send an unlock request. A notification will appear on the device's screen asking permission to connect.
This feature also applies to Family Sharing. If you've set up a Family Sharing group, your family members can connect to your internet without having to enter a complex password each time. To do this, the "Allow Family Members" option must be enabled in the Personal Hotspot settings.
How does instant connection work?
Instant connection is enabled by the AWDL (Apple Wireless Direct Link) protocol. Devices exchange service packets via Bluetooth Low Energy, discovering each other even when the Wi-Fi module is in sleep mode to conserve power. This allows the system to offer a connection almost instantly.
However, if you're connecting a device with someone else's Apple ID, you'll still need a password. In this case, the standard authorization process remains the same. Make sure Bluetooth and Wi-Fi are enabled on both devices, as they are used for the initial handshake and encryption key exchange.
Setting up security and changing your password
The security of transmitted data is a priority. By default iOS uses an encryption protocol WPA2/WPA3 Personal, which is a modern security standard. This means that the data between your iPhone and the connected device are encrypted, and it is extremely difficult to intercept them in the open air.
However, the default password generated by the system often contains complex characters that are difficult to enter manually, especially if you're connecting a laptop or device without a keyboard. You can change it to something easier to remember. To do this, tap "Wi-Fi Password" in the tethering menu and enter a new password.
The password must be at least 8 characters long. It's recommended to use a combination of letters and numbers. Avoid obvious combinations like "12345678" or "password," as they can be easily brute-forced. Remember that up to 5 devices can connect to your access point simultaneously (up to 10 on some models), and all of them will use your data.
| Parameter | Standard value | Recommended value | Impact on safety |
|---|---|---|---|
| Encryption type | WPA2/WPA3 | WPA2/WPA3 | High |
| Password length | 10+ characters | 12+ characters | Average |
| Name visibility | iPhone (Name) | Unique name | Low (protection from social engineering) |
| Max devices | 5 | 3-4 | Load control |
⚠️ Caution: Never leave your tethering modem enabled in public places without a password or with a simple password. Attackers can use your connection for illegal activities, and the police will be alerted to your IP address.
Troubleshooting and Frequency Ranges
Sometimes it happens that the receiving device simply "doesn't see" the access point, even though the donor device is enabled. One common cause is frequency band incompatibility. New iPhone can distribute the Internet at a frequency of 5 GHz, while older models or some budget gadgets only support 2.4 GHz.
To resolve this issue, you need to switch the compatibility mode. In the modem mode settings (or in the section Basics → About this device(If the option is not in the modem menu), find the "Maximum Compatibility" option. Enabling this switch will force iPhone broadcast the network in an older but universal standard.
It's also worth checking the reset settings. If nothing helps, try tapping "Forget this network" in the Wi-Fi connection properties on the receiving device and reconnecting. Briefly enabling airplane mode on both devices to reboot the network modules often helps.
Another cause of problems may be operator restrictions. Some providers block TTL (Time To Live), detecting that traffic is being distributed to other devices. In such cases, more complex configuration is required, including changing the TTL in the configuration, which iOS It's almost impossible to do without jailbreaking, but sometimes switching between 4G and 3G in the cellular settings helps.
Traffic consumption and optimization
Sharing the internet is a resource-intensive process. When you connect iPhone to Wi-Fi via another iPhone, traffic is consumed from the donor SIM card. It's important to understand that modern apps and operating systems are very data-hungry. Background app updates, photo syncing, and video calls can quickly exhaust your data plan.
iOS has built-in control mechanisms, but they aren't always effective when sharing data. You can monitor the total amount of data transferred on the device that's sharing the internet. To do this, go to Settings → Cellular and scroll down to "Modem Mode." It will show how many megabytes or gigabytes have been shared since the last reset.
To save data on the receiving device, we recommend disabling automatic updates in the App Store and disabling background content downloads. Also, avoid watching high-definition (4K) videos, as this places a significant strain on the network bandwidth and quickly drains the battery of both devices.
It's also worth keeping in mind that when actively using tethering, the device may become very hot. This is a normal physical reaction of the processor and modem to high loads. If the phone becomes hot, it's best to remove its case and place it on a hard surface to improve heat dissipation.
Why can't my iPhone see another iPhone's Personal Hotspot?
Most often, the issue lies in the distance or Bluetooth version. Make sure Bluetooth is enabled on both devices, even if you're connecting via Wi-Fi. Also, check if the "Data Saver" mode is enabled on the other device, which can limit background discovery processes.
Is it possible to share Wi-Fi if the donor doesn't have a SIM card?
No, tethering requires an active data connection. If your iPhone doesn't have a SIM card, it can only function as a Wi-Fi client (receiving a signal), but not as a router, unless it's connected to Wi-Fi and using the "Wi-Fi Sharing" feature (not available on all iOS versions and requiring specific settings on a Mac or PC).
How many devices can connect to an iPhone at the same time?
Officially Apple It claims to support up to 5 connections for most iPhone models and up to 10 for some newer versions. However, actual performance will begin to degrade after connecting 3-4 active devices, especially if they are consuming heavy content.
Does tethering affect the speed of the iPhone itself?
Yes, you may experience a slight decrease in interface performance and case heating. The processor is busy encoding and transmitting data packets, which places additional strain on the system. This may result in micro-freezes in games or heavy applications.
How do I change the network name my iPhone is broadcasting?
The default network name is taken from the device name. To change it, go to Settings → General → About → NameAfter changing the name, restart your modem so that the new network appears in the list of available connections.