As I think, ue does not latch any random cell to acquire PSS & SSS, rather upon power on, ue goes for freq scan , so in terms of power level or by rssi scan, it makes a list of frequencies, once it receives the best earfcn with power level , it goes for PSS & sss reading, then mib & sib & so on…
Inside Uesim all plmn priorities are defined so ue always goes for its own network plmn
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