Allwinner H313 Custom Rom 'link' -

This is the most reliable method for Allwinner H313 devices:

The Allwinner H313 is a highly popular, budget-friendly quad-core processor found in millions of generic Android TV boxes, streaming sticks, and IPTV devices. While these devices offer incredible value for money, their stock firmware is notoriously frustrating. Users frequently complain about bloated software, laggy interfaces, hidden malware, and a complete lack of official system updates. Allwinner H313 Custom Rom