Failure Issues & Response Codes?

 Failures can happen at different points in the process:-

Common Response Codes:-

Debugging RACH & Attach Issue:-

Step 1: Check RACH Messages

• RACH Preamble Transmission should be seen.
• If no response, check PRACH parameters.

Step 2: Check Attach Request

• Look for NAS: Attach Request in logs.
• If missing, UE may have SIM issues.