Module 05 · Diagnose · Fix

Something just broke. Find out what.

Five real 5G failures — exactly the symptoms you'd see in a packet trace. Read the symptom, diagnose the root cause, then pick the right fix. Score yourself.

Score · 0 / 0
SC-01 · RACH FAILURE Stage 1 of 2 · diagnose then fix

UE can't attach to the cell

Field engineer reports: "UE shows 'searching' and never connects. PRACH attempts visible in gNB logs but no Random Access Response. Same cell worked for previous UEs."

Spec: TS 38.321 §5.1 (Random Access procedure) · TS 38.213 §8 (PRACH config)
1

What's the most likely cause?

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