US Immigration from Pakistan

If someone has filed the petition for IR-1/CR-1 visa and they have a valid visit visa too. Can they travel to US?

i need help the petitioner is going to move at new house to change the address where should petitioner send documents our SC was taxes but the case was at Vermont then at feild office now dont know where is our case of anyone can tell us where we should send form to change the address

I had an interview on 18th of march 2021, the CO asked for original police certificate from United Kingdom (where i previously lived), i Provided the document the same day as it got delayed in the post so couldn't provide it during the interview. i posted the document on 18th march and the embassy acknowledged the receipt of the document the next day (19th march) but the case status still shows refused, the case last update changed 4 times, 22 march, 28 march, 30th march and now it changed yesterday 23 april, do any of you had any such experiance with the embassy? how long do they normally take to review the document. i contacted the embassy and they said the CO have not reviewed the document yet. thank you for your help.

One of my friend got immigrant visa this week and he want to fly this week to us. But he want to pay Green Card fee after reach in us on this any issue?