Download latest Android Lollipop 5.1 stock firmware for Leagoo Shark 1 smartphone from here or here.
Archive name: Leagoo Shark 1 MTK6753 Android 5.1 Smartphone Firmware 202617 160420
Archive file size: 762 MB
Support: Mediatek MT6753
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.
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