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Connect any USB modem to any Android tablet [root]

Normally, when we are working with our laptop or our WiFi tablet out there and we need to connect to the internet, it is enough for us to do tethering to enjoy internet on that device. But what happens when we need to be connected for a long time? Our main enemy is the battery drain that involves tethering from our smartphone, apart from the large consumption of data that means being so connected for so long. If we are one of those who use the internet a lot in such cases, we surely have one of the famous "skewers."

The popularly called "skewers" are the USB modems that operators give as a promotion for a data plan, or as an alternative to the data plan itself. Usually, these peripherals are not fully compatible with Android tablets. And it can be a great annoyance to need to use the modem and that our tablet does not recognize it.

One of the foreigners of XDA, Bhaskar1109, has discovered a way to avoid this incompatibility, making it possible for any Android tablet can use these modems to connect to the internet via mobile network. The process may seem a bit complicated, but if we have experience in touching some system files, we have root and we know how to handle the terminal on the PC and the tablet, everything will go smoothly.

For the process we will need an APK that we will install on the tablet and two scripts, which will be the ones we will put into the system. As well as some folders and files to modify. Everything is inside this compressed file that I recommend downloading before starting the process.

First steps

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<p>To create compatibility, we must put the USB modem in "modem only" mode (<strong>modem-only</strong>). This means that if the modem has a mass storage service (we can use it as <em>pendrive</em>), we will lose that characteristic. For it, <strong>we must find a way to do it</strong> In the net. Since <strong>Each modem model has its own system</strong>. Normally, it's about <strong>send some commands through the terminal</strong> Windows, so it shouldn't bring us too much trouble.</p>
<p>Then, we must find out the «<strong>vine</strong>" Y "<strong>pid</strong>»Of the modem. This can be achieved by going to the <strong>windows notification bar</strong>opening <strong>contextual menu</strong> in the modem icon (right click) and entering <em>Modem – Properties – Details</em>.</p>
<p>Once the «<strong>vine</strong>" Y "<strong>pid</strong>»Of the modem, we will need a file manager application. We are worth <em>ESFileExplorer</em>, <em>Solid explorer</em> or similar. I must emphasize that each file manager has a way to get root access. In the case of <em>ES File Explorer</em> <strong>we must give permission in the settings menu</strong>. In <em>Solid explorer</em>, Conversely, <strong>it will ask us for root access when we do an operation that requires it</strong>.</p>
<p>If we have already installed our file manager on the tablet and we are sure that you have permissions <strong>root</strong> to access the entire system, we have to go to the directory <strong><em>/system/bin/preinstall.sh</em></strong> <strong>and add a line</strong> to that file.</p>
<blockquote>
<p><strong>echo «19d2 1176»> / sys / bus / usb-serial / drivers / option1 / new_id</strong></p>
</blockquote>
<p><strong>Where 19d2 is the "vid" of the modem and 1176 is the "pid"</strong>. Only <strong>we must change those digits</strong> <strong>for which we had pointed</strong> previously.</p>
<h2>We restart the tablet</h2>
<p>In the file we download, there is a folder called «<em><strong>peers</strong></em>«. We open the conf-chat file and write our APN where it comes from.</p>
<p>When the tablet does not recognize the modem it will not generate the files <strong>ttyUSB,</strong> which are necessary to communicate with the modem. In the previous step, we changed the file so that it now recognizes the modem model and generates the files <strong>ttyUSB</strong>. If we want to make sure, we can check the operation <strong>writing in the Android terminal emulator</strong> (is in the Play Store) the command «<strong>dmesg</strong>" (without quotation marks). We scroll down and see the ports <strong>ttyUSB</strong> generated as capture. If this is checked successfully, <strong>we will have half a job done</strong>.</p>
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