is the last-resort protocol. It allows communication with the PBL over USB. The problem? EDL mode is crippled out of the box—it will only accept authenticated, signed commands from Qualcomm or the OEM (HMD Global/Nokia).
To ensure the correct loader is used, verify your device's core hardware: Nokia 3.4 - Full phone specifications - GSMArena.com Nokia 3.4 Firehose Loader
When the Nokia 3.4 is in EDL mode (often appearing as a black screen), it identifies itself as "Qualcomm HS-USB 9008". It initially uses the Sahara protocol to receive the Firehose loader file from a computer. is the last-resort protocol
Open . Select "Flat Build" or "Programmer Path." Browse to your Firehose Loader .elf file. Nokia 3.4 Firehose Loader