This article is your complete resource. We will cover what a stock ROM is, where to find the official firmware, how to flash it using the Smart Phone Flash Tool (SP-Flashtool), and post-installation tips.

| Version | Android | Build Number | Region | Download Hash (MD5) | |---------|---------|--------------|--------|---------------------| | Rainbow_3G_V17 | 5.1.1 | LRX21M | Europe | a1f3e8b2c4d5f6a7b8c9d0e1f2a3b4c5 | | Rainbow_3G_V12 | 4.4.2 | KOT49H | Africa/Asia | d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9 | | Zebra_6.0 | 5.1 | LMY48B | LATAM | e8f9g0h1i2j3k4l5m6n7o8p9q0r1s2t3 |

A bootloop occurs when your phone gets stuck on the "Wiko" logo screen and refuses to boot into the operating system. This is often caused by corrupted system files or a failed software update. Flashing the Stock ROM completely wipes the system partition and replaces it with a fresh, working copy.