Hi,
I am in US on a H1B visa
My wife is travelling to US on L1B (blanket) visa for company A, although she does not wish to continue with that company for long owing to the distance between us. Company B is ready to file for her H1B visa. Company A has a three month notice period.
1. When should the change of status be filed, to ensure that she does not have to sit back home during the period April/Oct
2. How long does it take for the COS to go through.
3. Can she keep working on L1 visa for company A while filing for a future date of COS of Oct 1st.
4. Like one can have multiple H1B visa's can one have L1 visa alongside a H1B visa?
5. Is it mandatory to file COS instead of an entirely new H1 application?

Thanks in advance.