The Nokia 3.4 (and many modern Nokia devices) presents a specific challenge:

For the (model numbers: TA-1283, TA-1285, TA-1287, TA-1291), the Firehose loader is required to:

Nokia smartphones are notorious for having locked bootloaders that don't support standard unlock commands. The Firehose loader changes the game by allowing:

Android 11 update released for Nokia 3.4: Details here - Yahoo Finance

Unlike Xiaomi or OnePlus, Nokia phones do not have a simple key combo for EDL. You have two methods: