Gurus Please advice (What next after GC)

LoraGC

Registered Users (C)
We got our Cards yesterday , planning to travel abroad in coming days, so please advice what should I do ?

1. Should I give my I-94 to IO at the port of departure ?
2. Should I go for change my SSN now or can I do it after my visit ?
3. How many days it wii take to get a clean SSN (current one is H1B only)
4.what is ADIT processing? should I go for that any more ? (So far known to me it is Alien Documentation, Identification & Telecommunications System, where we have to stamp on our approval Notice to process I-551 card)

Thanks in advance....
 
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