I-797B, Do I have to go out of US right now to get a new visa?

[SUGARH]

I got I-797B without I-94, issued at Dec/02/13

I-94 is still valid, until April 20, 2014.

Visa from previous company is still valid as I-94.

 

1. Do I have to go out of US right away? or can I go back to hometown middle of Jan?

 

2. Can I go to Canada for interview and get a new visa? or extend I-94?

 

3. is there any possibility to get denied because I am out of status and still in here?

 

4. Do I need to apply H1B for extension again instead of going back to my hometown to get a new visa?

 

thank you for your help.

[SUGARH]

called USCIS customer service and they informed me I can stay before the date I-94 expire.

also I visited immigrant center, and they told me that i need to fill out I-539 form and submitted. I am kind of confusion because I-539 is not for H1B holder, but H1B holder's family.

is there anyone who got extension by I-539 as H1B holder, even though you had already decision like i-797B?