"The operating system on your device is modified in an unauthorised way" System Update error on android device. <br /> <br />Note: <br />This option wouldn't work to rooted device, but it can be solved if you unroot the phone. <br /> <br />Steps: <br />1. Power off the device and access recovery mode <br />2. Use "Wipe cache partition " <br />You can also use " Wipe Data/ factory reset" , if this method doesn't work. find the procedure in the 2:26 <br />3.use "Reboot system Now" for normal start up. <br />Contact : deezzone <br />music credit: ticker- silent panther
