Teach you to crack Android phone OTG function

For Android phones with small built-in space and no support for SD card expansion, the use of OTG line external U disk is undoubtedly a "help" function. It is a pity that mobile phones including Lenovo S898t and Glory 3C are “casting”. Can we only listen to the fate? Software and application to retrieve OTG In fact, many Android phones do not support OTG, but through technical means to "block" & rdquo;, and the shielding methods are mainly based on two methods: 1. Streamlined 5V boost module support The biggest feature of the OTG mobile phone is that it can be charged when using the OTG cable to connect another mobile phone (Figure 1). Therefore, if a mobile phone does not support OTG, it is likely to streamline the 5V boost module. Meizu MX3 that supports OTG function can charge Lenovo S898t, otherwise it can't. 2. Delete key system code. The system/etc/vold.fstab file in the root directory of Android system contains a set of code to enable OTG function. Some manufacturers will Block the OTG function by removing the relevant code. At this point, the principle of Android mobile phone shielding OTG has been made clear, and to find this practical function, we need to start at both soft and hard angles. On the hardware side, we need to purchase an additional OTG cable (Figure 2) with DC5V power supply, and get additional power while connecting to the mobile phone to simulate the 5V boost module. It is the OTG line with a bifurcated head. One side can be connected to the mobile phone, and the other end can be connected to the charger software. We can copy the following code into the text file and copy it into the phone memory. # usb otg diskdev_mount usbotg /mnt/usbotg ///////////////////////////3), then use the text editor to open the system /etc /vold.fstab file (Figure 4), add a blank line at the end of the code, and finally paste the code to this (Figure 5), save and exit and restart the phone. Editing on the computer side, copying on the mobile phone can avoid manual input on the phone. Long press the file or click on the file. You can choose to open it with a text editor. There must be a blank line between the end of the code. If you need an external connection. Mobile hard disk, the charging end of the OTG line needs to be connected to a 9V or even 12V charger. This method is suitable for most of the MediaTek's Android phones. For mobile phones that are not MTK chips, the author cannot guarantee 100% success. Now connect the mobile phone to the USB flash drive with the OTG cable with power. Can the USB flash drive be recognized by the system? This article comes from [System Home] www.xp85.com