Maybe trying to downgrade firmware rather than going up? - try the latest firmware available.
Or reactivation lock was on?
There are a few PIT files around which should sort you out once you have it.
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// Nexus 5 (D821) // Liquid // UBER //
Note 3 (SM-N9005) // AOSP ROM of variety // Lean or temasek's Kernel // - Dumped. No more Samsung