Download Android Lollipop 5.1 stock firmware for LeTV One / S1 / Le 1 / x600 smartphone from here or here. Download previous firmware from here.
Archive: LeTV 1S Android 5.1 MTK Helio X10 Smartphone 198224 151218
Image: LeTV 1S Android 5.1 MTK Helio X10 Smartphone 198224 151218
Archive size: 840 MB
Support: Mediatek MT6795
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.
Don’t miss any of our future video tutorials, follow us on Youtube. Like us on Facebook. Add us in your circles on Google+. Watch our photo albums on Flickr. Subscribe now to our newsletter.