Nowadays, IPv6 is gaining more attention, and many universities are adopting the IPv4/IPv6 dual-stack protocol. In addition, affordable IPv6 routers priced under 100 yuan have also appeared on the market. However, most Android phones do not support IPv6 by default. Fortunately, there are simple methods to enable IPv6 support on your Android device.
**The Origin of IPv6 Network**
Since the Internet was first introduced in 1968, it has grown rapidly based on the TCP/IP protocol. As the number of connected devices increased, the limited number of IPv4 addresses became a problem. To address this, the IETF (Internet Engineering Task Force) began developing a next-generation protocol—IPv6. This new protocol solved the issue of IP address shortages and improved compatibility for network devices accessing the Internet.
**Introduction to Android Platform Architecture**
Android is a Linux-based operating system designed for mobile devices by Google and the Open Handset Alliance. Built on top of the Linux kernel, it uses the Yaffs2 file system and includes custom drivers for mobile hardware. The system has been optimized to better suit portable devices.
The Android framework is divided into four main layers: the Application layer, the Application Framework layer, the Libraries layer, and the Linux Kernel layer. The Linux Kernel layer handles interactions between the system and hardware, including security, memory management, process control, and network connectivity.
**How to Enable IPv6 on Android Phones**
To enable IPv6, your phone needs root access. You can use a one-click root tool like "Perfect Root."
Next, install "ES File Explorer" and use the Root Toolbox to mount the file system as "read-write" (RW).
Then, install "SManager," a powerful file manager that allows you to run scripts.
On your computer, open Notepad++ and copy the following code:
```
#!/system/bin/sh
for file in /proc/sys/net/ipv6/conf/*
do
echo 1 > $file/accept_ra_defrtr
done
```
Save the file as "EnableIPv6.sh" with UTF-8 encoding and UNIX line endings.
Transfer the script to your phone using ES File Explorer and move it to the `/etc` directory.
Use SManager to execute the script. After a few minutes, visit http://ipv6.tsinghua.edu.cn/ to check if your phone has received an IPv6 address.
**Precautions**
This method was tested on Android 4.0 (ICS). If it doesn't work, make sure the file system is mounted as RW. Also, both your ISP and router must support IPv6, and the router should have DHCP enabled.
**Experiment Process for Android IPv6 Connection**
**Hardware Equipment**
1. An IPv6-enabled Huawei router was used. It was confirmed that the device supports IPv6 and can act as a network source for the experiment.
2. A Xiaomi 4 smartphone (MI 4LTE) was used. All parameters were verified to ensure the phone meets the experimental requirements.
This image shows the Xiaomi 4 phone and its capabilities in supporting IPv6.
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