Yes, the I-551 stamp that you get upon your first entry on the immigrant visa can be used to travel.

There's no residency requirement for this visa category. You can remain outside of the US for long periods of time and can always enter the US as...

They will need a waiver and an attorney. This can be quite difficult to overcome in some cases.

You may be mixing up your I-94 with the expiration date of your visa. The effective date of change is generally the date you want to assume a new...

It’s probably not possible, but I would need more information about the case. Do you mean you want to change your status to R1? Or are you actually...

It depends on where you are applying, but they generally take about 18 months. There are advantages and disadvantages to the fiancé visa vs. the...

Her mother should just submit a tourist visa application herself without the involvement of you or your spouse. Her mother will have to qualify on...

You could look into EB-2 NIW options for advanced degree STEM professionals.

He should file form I-539 for the extension. But they are taking a very long time to be approved right now, so he probably will end up leaving...

There is a bit more information needed to answer your question. If she gets an immigrant visa at an embassy and uses that to enter the US, the...