Re-enter us from mexico

[tara12]

Hi Guys,

 

need urgent help.................

I was on h1b I am planning to re-enter US on my preivious h4 to correct my status.I heard if we travel to mexico by land we get a paper i-94.

 

Can you please help:-

 

1. What all documents i need to re-enter on h4?

2. Do i need to travel by air only?

3. Do we neeed to update i-94 after i re-enter or will it be done automatically?

 

p.s. Or a simple process if any one who has travelled by land can tell