♻️Install ADB & Fastboot for Android♻️

✅On your already-rooted phone, head into the Magisk Manager app and tap the puzzle piece icon on the menu bar at the bottom of the screen. Here, tap the search icon and enter "adb" into the field, then tap the download button next to the ADB & Fastboot for Android NDK module. Tap "Install" and grant Magisk Manager access to your media if prompted, then it will be installed. When done, tap "Reboot."

✅Step 2Install the Termux App

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✨You'll need a terminal app on the phone that has root access in order to send over the ADB and Fastboot commands to the other phone.Preferebly termux

✅Step 3Enable USB Debugging

✨On the secondary phone that you want to send commands to, you'll need to enable the "USB debugging" toggle in Developer Options so the phone will accept commands. So go to Settings–> About phone, then tap "Build number" seven times quickly to enable Developer Options, then open the menu from Settings –> System –> Advanced (or the bottom of Settings) and enable "USB debugging.

✅Step 4Connect the 2 Android Phones

✨If both of the phones were released in the last five years, you'll probably only need a single USB Type-C cable to connect them together. However, if you don't have a Type-C cable that has the same connector on both ends, you'll need an OTG adapter.

If one of the phones is Micro USB and the other is USB Type-C, you'll need two things: a Micro USB OTG cable and a USB A to USB C cable.

If you need to use an OTG adapter, plug it directly into the phone that has root access and Termux installed, then connect the USB data cable from there to the other phone. Otherwise, you'll be using a Type-C to Type-C cable, which means it doesn't matter which phone you connect first since they both use the same connector. It all comes down to what cables you have available to you at the time.

✅Step 5Allow USB Debugging

✨Once both phones are physically connected, the secondary phone should receive the "Allow USB debugging" prompt instantly (if not, try reconnecting the phone). Tick the box next to "Always allow," then hit "OK" to confirm the choice. This means your primary phone will now be labeled as a trusted device and can send commands to the secondary device at any time.

If you don't see this dialog box right away, don't panic — you can proceed with this guide. Just be on the lookout for this popup, particularly after sending the command in Step 7

‼️If your secondary device is a recent Samsung phone, you'll probably need to change the "USB controlled by" option via the file transfer notification. Change it from "Connected device" to "This phone," then once it's switched over, the USB debugging prompt should pop up.

‼️If you want to prevent one phone from draining the battery of the other,be sure to disable the "Charge connected device" option. This only affects phones that have a Type-C charging port, so keep that in mind as well for future use.

✅Step 6Grant Root Access

✨Now, head over to the phone that has Termux installed so that you can grant it root access, which is necessary for all this to work. Type the following command in Termux, then press enter.

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