Can some tell what is UE average attach time in LTE?
ideally it should be less than 1ms
On DT KPI level, usually the threshold is 100ms. If you have simultaneous SMC + RRC Reconfig then it should be completed within 70-80ms.
Based on my experience it is between 400~500 ms.
The capture points are the time between attach request message and attach complete message (it is based on the network).