This method wipes ALL data. Use only if OTA/HiSuite fails.
Copy the folder onto your phone's MicroSD card or OTG drive. Open the native Phone/Dialer application on your MAR-LX3A. Input the following code string: *#*#2846579#*#* A hidden interface named ProjectMenu will launch instantly. Tap option 4. Software Upgrade . huawei p30 lite marlx3a firmware download upd
Go to Settings > About Phone and verify the model is exactly " Go to product viewer dialog for this item. Huawei P30 Lite MAR-LX3A Go to product viewer dialog for this item. Firmware Download Sources Finding the correct firmware is the most critical step. This method wipes ALL data
He found it on a dusty corner of a developer site: . The download bar crawled forward. 60%... 85%... 100%. Open the native Phone/Dialer application on your MAR-LX3A
A stable and fast internet connection is necessary for downloading the firmware update.
: Huawei has explicitly warned users to avoid downloading unofficial software as it can void the warranty and cause "irreparable damage" to the phone. The sites above host official ROMs, but it is the user's responsibility to ensure compatibility.
Huawei P30 Lite Upgrade Guide | PDF | Zip (File Format) - Scribd