Downloading firmware for the Huawei P30 Lite (MAR-LX3A) requires caution, as using the wrong region or build number can lead to a "brick." For this specific model, official and semi-official methods are the most reliable. Recommended Download & Installation Methods

Puedes encontrar el stock ROM oficial en las siguientes plataformas especializadas:

HalabTech: A popular choice for technical users, hosting various EMUI versions like 9.1 and 10.0. Installation Methods

A microSD card (minimum 8GB) and the correct firmware package for the Download the firmware and extract it until you find the UPDATE.APP Create a folder named in the root of your SD card/USB drive and copy the UPDATE.APP (and any associated zip files) into it. Power off the phone. Connect the drive/SD card. Press and hold the Volume Up + Volume Down + Power buttons simultaneously.